Home / 20,587.50-28,410.89-11,156.13

Finding the Fourth Proportional to 20,587.50, 28,410.89 and 11,156.13

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Solution

The fourth proportional to 20,587.50, 28,410.89 and 11,156.13 is: 15,395.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,587.50 : 28,410.89 = 11,156.13 : x
  2. Step 2: Convert to fraction form
    20,587.50/28,410.89 = 11,156.13/x
  3. Step 3: Cross multiply
    20,587.50x = 28,410.89 × 11,156.13
  4. Step 4: Simplify right side
    20,587.50x = 316,955,526.48
  5. Step 5: Solve for x
    x = 316,955,526.48/20,587.50
  6. Step 6: Final answer
    x = 15,395.53

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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.