Home / 38,780.20-58,175.80-12,478.82

Finding the Fourth Proportional to 38,780.20, 58,175.80 and 12,478.82

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Solution

The fourth proportional to 38,780.20, 58,175.80 and 12,478.82 is: 18,720.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,780.20 : 58,175.80 = 12,478.82 : x
  2. Step 2: Convert to fraction form
    38,780.20/58,175.80 = 12,478.82/x
  3. Step 3: Cross multiply
    38,780.20x = 58,175.80 × 12,478.82
  4. Step 4: Simplify right side
    38,780.20x = 725,965,336.56
  5. Step 5: Solve for x
    x = 725,965,336.56/38,780.20
  6. Step 6: Final answer
    x = 18,720.00

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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.