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Finding the Fourth Proportional to 9,000.58, 12,420.21 and 5,643.25

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Solution

The fourth proportional to 9,000.58, 12,420.21 and 5,643.25 is: 7,787.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,000.58 : 12,420.21 = 5,643.25 : x
  2. Step 2: Convert to fraction form
    9,000.58/12,420.21 = 5,643.25/x
  3. Step 3: Cross multiply
    9,000.58x = 12,420.21 × 5,643.25
  4. Step 4: Simplify right side
    9,000.58x = 70,090,350.08
  5. Step 5: Solve for x
    x = 70,090,350.08/9,000.58
  6. Step 6: Final answer
    x = 7,787.31

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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.