Home / 7,139.24-9,852.90-3,996.20

Finding the Fourth Proportional to 7,139.24, 9,852.90 and 3,996.20

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Solution

The fourth proportional to 7,139.24, 9,852.90 and 3,996.20 is: 5,515.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,139.24 : 9,852.90 = 3,996.20 : x
  2. Step 2: Convert to fraction form
    7,139.24/9,852.90 = 3,996.20/x
  3. Step 3: Cross multiply
    7,139.24x = 9,852.90 × 3,996.20
  4. Step 4: Simplify right side
    7,139.24x = 39,374,158.98
  5. Step 5: Solve for x
    x = 39,374,158.98/7,139.24
  6. Step 6: Final answer
    x = 5,515.18

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Half scale
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Double scale
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Similar ratio
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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.