Home / 39,115.20-58,658.40-12,820.80

Finding the Fourth Proportional to 39,115.20, 58,658.40 and 12,820.80

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Solution

The fourth proportional to 39,115.20, 58,658.40 and 12,820.80 is: 19,226.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,115.20 : 58,658.40 = 12,820.80 : x
  2. Step 2: Convert to fraction form
    39,115.20/58,658.40 = 12,820.80/x
  3. Step 3: Cross multiply
    39,115.20x = 58,658.40 × 12,820.80
  4. Step 4: Simplify right side
    39,115.20x = 752,047,614.72
  5. Step 5: Solve for x
    x = 752,047,614.72/39,115.20
  6. Step 6: Final answer
    x = 19,226.48

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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.