Home / 20,869.91-28,800.56-11,309.82

Finding the Fourth Proportional to 20,869.91, 28,800.56 and 11,309.82

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Solution

The fourth proportional to 20,869.91, 28,800.56 and 11,309.82 is: 15,607.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,869.91 : 28,800.56 = 11,309.82 : x
  2. Step 2: Convert to fraction form
    20,869.91/28,800.56 = 11,309.82/x
  3. Step 3: Cross multiply
    20,869.91x = 28,800.56 × 11,309.82
  4. Step 4: Simplify right side
    20,869.91x = 325,729,177.77
  5. Step 5: Solve for x
    x = 325,729,177.77/20,869.91
  6. Step 6: Final answer
    x = 15,607.60

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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.