Home / 15,489.99-21,385.08-10,200.21

Finding the Fourth Proportional to 15,489.99, 21,385.08 and 10,200.21

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Solution

The fourth proportional to 15,489.99, 21,385.08 and 10,200.21 is: 14,082.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,489.99 : 21,385.08 = 10,200.21 : x
  2. Step 2: Convert to fraction form
    15,489.99/21,385.08 = 10,200.21/x
  3. Step 3: Cross multiply
    15,489.99x = 21,385.08 × 10,200.21
  4. Step 4: Simplify right side
    15,489.99x = 218,132,306.87
  5. Step 5: Solve for x
    x = 218,132,306.87/15,489.99
  6. Step 6: Final answer
    x = 14,082.15

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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.