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Finding the Fourth Proportional to 38,145.80, 57,218.70 and 10,065.80

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Solution

The fourth proportional to 38,145.80, 57,218.70 and 10,065.80 is: 15,098.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,145.80 : 57,218.70 = 10,065.80 : x
  2. Step 2: Convert to fraction form
    38,145.80/57,218.70 = 10,065.80/x
  3. Step 3: Cross multiply
    38,145.80x = 57,218.70 × 10,065.80
  4. Step 4: Simplify right side
    38,145.80x = 575,951,990.46
  5. Step 5: Solve for x
    x = 575,951,990.46/38,145.80
  6. Step 6: Final answer
    x = 15,098.70

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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.