Home / 20,335.38-28,063.89-12,778.91

Finding the Fourth Proportional to 20,335.38, 28,063.89 and 12,778.91

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Solution

The fourth proportional to 20,335.38, 28,063.89 and 12,778.91 is: 17,635.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,335.38 : 28,063.89 = 12,778.91 : x
  2. Step 2: Convert to fraction form
    20,335.38/28,063.89 = 12,778.91/x
  3. Step 3: Cross multiply
    20,335.38x = 28,063.89 × 12,778.91
  4. Step 4: Simplify right side
    20,335.38x = 358,625,889.48
  5. Step 5: Solve for x
    x = 358,625,889.48/20,335.38
  6. Step 6: Final answer
    x = 17,635.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.