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Finding the Fourth Proportional to 9,000.75, 12,420.95 and 5,022.84

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Solution

The fourth proportional to 9,000.75, 12,420.95 and 5,022.84 is: 6,931.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,000.75 : 12,420.95 = 5,022.84 : x
  2. Step 2: Convert to fraction form
    9,000.75/12,420.95 = 5,022.84/x
  3. Step 3: Cross multiply
    9,000.75x = 12,420.95 × 5,022.84
  4. Step 4: Simplify right side
    9,000.75x = 62,388,465.96
  5. Step 5: Solve for x
    x = 62,388,465.96/9,000.75
  6. Step 6: Final answer
    x = 6,931.47

Related Problems

Find fourth proportional to 4,500.38, 6,210.47 and 2,511.42
Half scale
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Double scale
Find fourth proportional to 9,001.75, 12,422.32 and 5,023.84
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.