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Finding the Fourth Proportional to 18,854.80, 26,020.80 and 10,471.28

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Solution

The fourth proportional to 18,854.80, 26,020.80 and 10,471.28 is: 14,451.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,854.80 : 26,020.80 = 10,471.28 : x
  2. Step 2: Convert to fraction form
    18,854.80/26,020.80 = 10,471.28/x
  3. Step 3: Cross multiply
    18,854.80x = 26,020.80 × 10,471.28
  4. Step 4: Simplify right side
    18,854.80x = 272,471,082.62
  5. Step 5: Solve for x
    x = 272,471,082.62/18,854.80
  6. Step 6: Final answer
    x = 14,451.02

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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.