Home / 20,365.52-28,121.54-15,320.98

Finding the Fourth Proportional to 20,365.52, 28,121.54 and 15,320.98

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Solution

The fourth proportional to 20,365.52, 28,121.54 and 15,320.98 is: 21,155.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,365.52 : 28,121.54 = 15,320.98 : x
  2. Step 2: Convert to fraction form
    20,365.52/28,121.54 = 15,320.98/x
  3. Step 3: Cross multiply
    20,365.52x = 28,121.54 × 15,320.98
  4. Step 4: Simplify right side
    20,365.52x = 430,849,551.91
  5. Step 5: Solve for x
    x = 430,849,551.91/20,365.52
  6. Step 6: Final answer
    x = 21,155.83

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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.