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Finding the Fourth Proportional to 20,291.70, 30,437.55 and 14,718.90

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Solution

The fourth proportional to 20,291.70, 30,437.55 and 14,718.90 is: 22,078.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,291.70 : 30,437.55 = 14,718.90 : x
  2. Step 2: Convert to fraction form
    20,291.70/30,437.55 = 14,718.90/x
  3. Step 3: Cross multiply
    20,291.70x = 30,437.55 × 14,718.90
  4. Step 4: Simplify right side
    20,291.70x = 448,007,254.70
  5. Step 5: Solve for x
    x = 448,007,254.70/20,291.70
  6. Step 6: Final answer
    x = 22,078.35

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.