Home / 20,384.46-28,130.19-11,431.95

Finding the Fourth Proportional to 20,384.46, 28,130.19 and 11,431.95

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Solution

The fourth proportional to 20,384.46, 28,130.19 and 11,431.95 is: 15,775.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,384.46 : 28,130.19 = 11,431.95 : x
  2. Step 2: Convert to fraction form
    20,384.46/28,130.19 = 11,431.95/x
  3. Step 3: Cross multiply
    20,384.46x = 28,130.19 × 11,431.95
  4. Step 4: Simplify right side
    20,384.46x = 321,582,925.57
  5. Step 5: Solve for x
    x = 321,582,925.57/20,384.46
  6. Step 6: Final answer
    x = 15,775.89

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Half scale
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Double scale
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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.