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Finding the Fourth Proportional to 15,348.62, 21,169.76 and 9,375.38

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Solution

The fourth proportional to 15,348.62, 21,169.76 and 9,375.38 is: 12,931.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,348.62 : 21,169.76 = 9,375.38 : x
  2. Step 2: Convert to fraction form
    15,348.62/21,169.76 = 9,375.38/x
  3. Step 3: Cross multiply
    15,348.62x = 21,169.76 × 9,375.38
  4. Step 4: Simplify right side
    15,348.62x = 198,474,544.51
  5. Step 5: Solve for x
    x = 198,474,544.51/15,348.62
  6. Step 6: Final answer
    x = 12,931.10

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Half scale
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Double scale
Find fourth proportional to 15,349.62, 21,171.14 and 9,376.38
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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.