Home / 20,588.08-28,411.50-11,156.80

Finding the Fourth Proportional to 20,588.08, 28,411.50 and 11,156.80

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Solution

The fourth proportional to 20,588.08, 28,411.50 and 11,156.80 is: 15,396.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,588.08 : 28,411.50 = 11,156.80 : x
  2. Step 2: Convert to fraction form
    20,588.08/28,411.50 = 11,156.80/x
  3. Step 3: Cross multiply
    20,588.08x = 28,411.50 × 11,156.80
  4. Step 4: Simplify right side
    20,588.08x = 316,981,423.20
  5. Step 5: Solve for x
    x = 316,981,423.20/20,588.08
  6. Step 6: Final answer
    x = 15,396.36

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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.