Home / 20,588.19-28,411.80-11,156.73

Finding the Fourth Proportional to 20,588.19, 28,411.80 and 11,156.73

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Solution

The fourth proportional to 20,588.19, 28,411.80 and 11,156.73 is: 15,396.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,588.19 : 28,411.80 = 11,156.73 : x
  2. Step 2: Convert to fraction form
    20,588.19/28,411.80 = 11,156.73/x
  3. Step 3: Cross multiply
    20,588.19x = 28,411.80 × 11,156.73
  4. Step 4: Simplify right side
    20,588.19x = 316,982,781.41
  5. Step 5: Solve for x
    x = 316,982,781.41/20,588.19
  6. Step 6: Final answer
    x = 15,396.34

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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.