Home / 20,640.68-28,488.67-13,567.76

Finding the Fourth Proportional to 20,640.68, 28,488.67 and 13,567.76

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Solution

The fourth proportional to 20,640.68, 28,488.67 and 13,567.76 is: 18,726.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,640.68 : 28,488.67 = 13,567.76 : x
  2. Step 2: Convert to fraction form
    20,640.68/28,488.67 = 13,567.76/x
  3. Step 3: Cross multiply
    20,640.68x = 28,488.67 × 13,567.76
  4. Step 4: Simplify right side
    20,640.68x = 386,527,260.92
  5. Step 5: Solve for x
    x = 386,527,260.92/20,640.68
  6. Step 6: Final answer
    x = 18,726.48

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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.