Home / 18,126.63-27,189.95-6,439.55

Finding the Fourth Proportional to 18,126.63, 27,189.95 and 6,439.55

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Solution

The fourth proportional to 18,126.63, 27,189.95 and 6,439.55 is: 9,659.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,126.63 : 27,189.95 = 6,439.55 : x
  2. Step 2: Convert to fraction form
    18,126.63/27,189.95 = 6,439.55/x
  3. Step 3: Cross multiply
    18,126.63x = 27,189.95 × 6,439.55
  4. Step 4: Simplify right side
    18,126.63x = 175,090,874.38
  5. Step 5: Solve for x
    x = 175,090,874.38/18,126.63
  6. Step 6: Final answer
    x = 9,659.32

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.