Home / 38,639.40-57,959.10-12,346.80

Finding the Fourth Proportional to 38,639.40, 57,959.10 and 12,346.80

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Solution

The fourth proportional to 38,639.40, 57,959.10 and 12,346.80 is: 18,520.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,639.40 : 57,959.10 = 12,346.80 : x
  2. Step 2: Convert to fraction form
    38,639.40/57,959.10 = 12,346.80/x
  3. Step 3: Cross multiply
    38,639.40x = 57,959.10 × 12,346.80
  4. Step 4: Simplify right side
    38,639.40x = 715,609,415.88
  5. Step 5: Solve for x
    x = 715,609,415.88/38,639.40
  6. Step 6: Final answer
    x = 18,520.20

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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.