Home / 13,129.08-18,118.11-7,160.76

Finding the Fourth Proportional to 13,129.08, 18,118.11 and 7,160.76

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Solution

The fourth proportional to 13,129.08, 18,118.11 and 7,160.76 is: 9,881.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,129.08 : 18,118.11 = 7,160.76 : x
  2. Step 2: Convert to fraction form
    13,129.08/18,118.11 = 7,160.76/x
  3. Step 3: Cross multiply
    13,129.08x = 18,118.11 × 7,160.76
  4. Step 4: Simplify right side
    13,129.08x = 129,739,437.36
  5. Step 5: Solve for x
    x = 129,739,437.36/13,129.08
  6. Step 6: Final answer
    x = 9,881.84

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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.