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Finding the Fourth Proportional to 13,162.66, 18,166.08 and 7,498.78

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Solution

The fourth proportional to 13,162.66, 18,166.08 and 7,498.78 is: 10,349.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,162.66 : 18,166.08 = 7,498.78 : x
  2. Step 2: Convert to fraction form
    13,162.66/18,166.08 = 7,498.78/x
  3. Step 3: Cross multiply
    13,162.66x = 18,166.08 × 7,498.78
  4. Step 4: Simplify right side
    13,162.66x = 136,223,437.38
  5. Step 5: Solve for x
    x = 136,223,437.38/13,162.66
  6. Step 6: Final answer
    x = 10,349.23

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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.