Home / 20,384.52-28,120.95-13,581.71

Finding the Fourth Proportional to 20,384.52, 28,120.95 and 13,581.71

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Solution

The fourth proportional to 20,384.52, 28,120.95 and 13,581.71 is: 18,736.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,384.52 : 28,120.95 = 13,581.71 : x
  2. Step 2: Convert to fraction form
    20,384.52/28,120.95 = 13,581.71/x
  3. Step 3: Cross multiply
    20,384.52x = 28,120.95 × 13,581.71
  4. Step 4: Simplify right side
    20,384.52x = 381,930,447.22
  5. Step 5: Solve for x
    x = 381,930,447.22/20,384.52
  6. Step 6: Final answer
    x = 18,736.30

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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.