Home / 9,127.36-12,591.68-7,239.68

Finding the Fourth Proportional to 9,127.36, 12,591.68 and 7,239.68

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Solution

The fourth proportional to 9,127.36, 12,591.68 and 7,239.68 is: 9,987.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,127.36 : 12,591.68 = 7,239.68 : x
  2. Step 2: Convert to fraction form
    9,127.36/12,591.68 = 7,239.68/x
  3. Step 3: Cross multiply
    9,127.36x = 12,591.68 × 7,239.68
  4. Step 4: Simplify right side
    9,127.36x = 91,159,733.86
  5. Step 5: Solve for x
    x = 91,159,733.86/9,127.36
  6. Step 6: Final answer
    x = 9,987.52

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Half 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.