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Finding the Fourth Proportional to 28,123.74, 42,192.48 and 9,405.72

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Solution

The fourth proportional to 28,123.74, 42,192.48 and 9,405.72 is: 14,110.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,123.74 : 42,192.48 = 9,405.72 : x
  2. Step 2: Convert to fraction form
    28,123.74/42,192.48 = 9,405.72/x
  3. Step 3: Cross multiply
    28,123.74x = 42,192.48 × 9,405.72
  4. Step 4: Simplify right side
    28,123.74x = 396,850,652.99
  5. Step 5: Solve for x
    x = 396,850,652.99/28,123.74
  6. Step 6: Final answer
    x = 14,110.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.