Home / 9,122.72-12,588.30-5,143.76

Finding the Fourth Proportional to 9,122.72, 12,588.30 and 5,143.76

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Solution

The fourth proportional to 9,122.72, 12,588.30 and 5,143.76 is: 7,097.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,122.72 : 12,588.30 = 5,143.76 : x
  2. Step 2: Convert to fraction form
    9,122.72/12,588.30 = 5,143.76/x
  3. Step 3: Cross multiply
    9,122.72x = 12,588.30 × 5,143.76
  4. Step 4: Simplify right side
    9,122.72x = 64,751,194.01
  5. Step 5: Solve for x
    x = 64,751,194.01/9,122.72
  6. Step 6: Final answer
    x = 7,097.79

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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.