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Finding the Fourth Proportional to 22,248.88, 30,711.12 and 12,821.20

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Solution

The fourth proportional to 22,248.88, 30,711.12 and 12,821.20 is: 17,697.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,248.88 : 30,711.12 = 12,821.20 : x
  2. Step 2: Convert to fraction form
    22,248.88/30,711.12 = 12,821.20/x
  3. Step 3: Cross multiply
    22,248.88x = 30,711.12 × 12,821.20
  4. Step 4: Simplify right side
    22,248.88x = 393,753,411.74
  5. Step 5: Solve for x
    x = 393,753,411.74/22,248.88
  6. Step 6: Final answer
    x = 17,697.67

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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.