Home / 7,139.72-9,853.98-3,996.92

Finding the Fourth Proportional to 7,139.72, 9,853.98 and 3,996.92

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Solution

The fourth proportional to 7,139.72, 9,853.98 and 3,996.92 is: 5,516.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,139.72 : 9,853.98 = 3,996.92 : x
  2. Step 2: Convert to fraction form
    7,139.72/9,853.98 = 3,996.92/x
  3. Step 3: Cross multiply
    7,139.72x = 9,853.98 × 3,996.92
  4. Step 4: Simplify right side
    7,139.72x = 39,385,569.74
  5. Step 5: Solve for x
    x = 39,385,569.74/7,139.72
  6. Step 6: Final answer
    x = 5,516.40

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Half scale
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Double scale
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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.