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Finding the Fourth Proportional to 22,019.70, 30,387.21 and 11,948.16

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Solution

The fourth proportional to 22,019.70, 30,387.21 and 11,948.16 is: 16,488.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,019.70 : 30,387.21 = 11,948.16 : x
  2. Step 2: Convert to fraction form
    22,019.70/30,387.21 = 11,948.16/x
  3. Step 3: Cross multiply
    22,019.70x = 30,387.21 × 11,948.16
  4. Step 4: Simplify right side
    22,019.70x = 363,071,247.03
  5. Step 5: Solve for x
    x = 363,071,247.03/22,019.70
  6. Step 6: Final answer
    x = 16,488.47

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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.