Home / 20,816.54-28,727.52-11,385.10

Finding the Fourth Proportional to 20,816.54, 28,727.52 and 11,385.10

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Solution

The fourth proportional to 20,816.54, 28,727.52 and 11,385.10 is: 15,711.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,816.54 : 28,727.52 = 11,385.10 : x
  2. Step 2: Convert to fraction form
    20,816.54/28,727.52 = 11,385.10/x
  3. Step 3: Cross multiply
    20,816.54x = 28,727.52 × 11,385.10
  4. Step 4: Simplify right side
    20,816.54x = 327,065,681.17
  5. Step 5: Solve for x
    x = 327,065,681.17/20,816.54
  6. Step 6: Final answer
    x = 15,711.82

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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.