Home / 20,630.30-28,471.10-11,678.18

Finding the Fourth Proportional to 20,630.30, 28,471.10 and 11,678.18

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Solution

The fourth proportional to 20,630.30, 28,471.10 and 11,678.18 is: 16,116.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,630.30 : 28,471.10 = 11,678.18 : x
  2. Step 2: Convert to fraction form
    20,630.30/28,471.10 = 11,678.18/x
  3. Step 3: Cross multiply
    20,630.30x = 28,471.10 × 11,678.18
  4. Step 4: Simplify right side
    20,630.30x = 332,490,429.85
  5. Step 5: Solve for x
    x = 332,490,429.85/20,630.30
  6. Step 6: Final answer
    x = 16,116.61

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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.