Home / 10,387.90-15,545.40-7,107.40

Finding the Fourth Proportional to 10,387.90, 15,545.40 and 7,107.40

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Solution

The fourth proportional to 10,387.90, 15,545.40 and 7,107.40 is: 10,636.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,387.90 : 15,545.40 = 7,107.40 : x
  2. Step 2: Convert to fraction form
    10,387.90/15,545.40 = 7,107.40/x
  3. Step 3: Cross multiply
    10,387.90x = 15,545.40 × 7,107.40
  4. Step 4: Simplify right side
    10,387.90x = 110,487,375.96
  5. Step 5: Solve for x
    x = 110,487,375.96/10,387.90
  6. Step 6: Final answer
    x = 10,636.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.