Home / 11,117.72-15,339.87-6,642.92

Finding the Fourth Proportional to 11,117.72, 15,339.87 and 6,642.92

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Solution

The fourth proportional to 11,117.72, 15,339.87 and 6,642.92 is: 9,165.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,117.72 : 15,339.87 = 6,642.92 : x
  2. Step 2: Convert to fraction form
    11,117.72/15,339.87 = 6,642.92/x
  3. Step 3: Cross multiply
    11,117.72x = 15,339.87 × 6,642.92
  4. Step 4: Simplify right side
    11,117.72x = 101,901,529.22
  5. Step 5: Solve for x
    x = 101,901,529.22/11,117.72
  6. Step 6: Final answer
    x = 9,165.69

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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.