Home / 15,737.20-21,709.56-13,404.40

Finding the Fourth Proportional to 15,737.20, 21,709.56 and 13,404.40

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Solution

The fourth proportional to 15,737.20, 21,709.56 and 13,404.40 is: 18,491.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,737.20 : 21,709.56 = 13,404.40 : x
  2. Step 2: Convert to fraction form
    15,737.20/21,709.56 = 13,404.40/x
  3. Step 3: Cross multiply
    15,737.20x = 21,709.56 × 13,404.40
  4. Step 4: Simplify right side
    15,737.20x = 291,003,626.06
  5. Step 5: Solve for x
    x = 291,003,626.06/15,737.20
  6. Step 6: Final answer
    x = 18,491.45

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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.