Home / 38,685.92-58,029.68-12,390.59

Finding the Fourth Proportional to 38,685.92, 58,029.68 and 12,390.59

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Solution

The fourth proportional to 38,685.92, 58,029.68 and 12,390.59 is: 18,586.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,685.92 : 58,029.68 = 12,390.59 : x
  2. Step 2: Convert to fraction form
    38,685.92/58,029.68 = 12,390.59/x
  3. Step 3: Cross multiply
    38,685.92x = 58,029.68 × 12,390.59
  4. Step 4: Simplify right side
    38,685.92x = 719,021,620.61
  5. Step 5: Solve for x
    x = 719,021,620.61/38,685.92
  6. Step 6: Final answer
    x = 18,586.13

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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.