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Finding the Fourth Proportional to 22,269.92, 30,721.76 and 14,719.20

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Solution

The fourth proportional to 22,269.92, 30,721.76 and 14,719.20 is: 20,305.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,269.92 : 30,721.76 = 14,719.20 : x
  2. Step 2: Convert to fraction form
    22,269.92/30,721.76 = 14,719.20/x
  3. Step 3: Cross multiply
    22,269.92x = 30,721.76 × 14,719.20
  4. Step 4: Simplify right side
    22,269.92x = 452,199,729.79
  5. Step 5: Solve for x
    x = 452,199,729.79/22,269.92
  6. Step 6: Final answer
    x = 20,305.40

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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.