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Finding the Fourth Proportional to 10,387.60, 15,572.04 and 3,809.20

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Solution

The fourth proportional to 10,387.60, 15,572.04 and 3,809.20 is: 5,710.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,387.60 : 15,572.04 = 3,809.20 : x
  2. Step 2: Convert to fraction form
    10,387.60/15,572.04 = 3,809.20/x
  3. Step 3: Cross multiply
    10,387.60x = 15,572.04 × 3,809.20
  4. Step 4: Simplify right side
    10,387.60x = 59,317,014.77
  5. Step 5: Solve for x
    x = 59,317,014.77/10,387.60
  6. Step 6: Final answer
    x = 5,710.37

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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.