Home / 20,587.75-28,411.23-11,156.38

Finding the Fourth Proportional to 20,587.75, 28,411.23 and 11,156.38

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Solution

The fourth proportional to 20,587.75, 28,411.23 and 11,156.38 is: 15,395.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,587.75 : 28,411.23 = 11,156.38 : x
  2. Step 2: Convert to fraction form
    20,587.75/28,411.23 = 11,156.38/x
  3. Step 3: Cross multiply
    20,587.75x = 28,411.23 × 11,156.38
  4. Step 4: Simplify right side
    20,587.75x = 316,966,478.15
  5. Step 5: Solve for x
    x = 316,966,478.15/20,587.75
  6. Step 6: Final answer
    x = 15,395.88

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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.