Home / 20,685.05-28,545.21-11,253.62

Finding the Fourth Proportional to 20,685.05, 28,545.21 and 11,253.62

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Solution

The fourth proportional to 20,685.05, 28,545.21 and 11,253.62 is: 15,529.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,685.05 : 28,545.21 = 11,253.62 : x
  2. Step 2: Convert to fraction form
    20,685.05/28,545.21 = 11,253.62/x
  3. Step 3: Cross multiply
    20,685.05x = 28,545.21 × 11,253.62
  4. Step 4: Simplify right side
    20,685.05x = 321,236,946.16
  5. Step 5: Solve for x
    x = 321,236,946.16/20,685.05
  6. Step 6: Final answer
    x = 15,529.91

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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.