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Finding the Fourth Proportional to 9,000.50, 12,420.86 and 5,021.18

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Solution

The fourth proportional to 9,000.50, 12,420.86 and 5,021.18 is: 6,929.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,000.50 : 12,420.86 = 5,021.18 : x
  2. Step 2: Convert to fraction form
    9,000.50/12,420.86 = 5,021.18/x
  3. Step 3: Cross multiply
    9,000.50x = 12,420.86 × 5,021.18
  4. Step 4: Simplify right side
    9,000.50x = 62,367,286.60
  5. Step 5: Solve for x
    x = 62,367,286.60/9,000.50
  6. Step 6: Final answer
    x = 6,929.32

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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.