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Finding the Fourth Proportional to 22,280.76, 30,747.06 and 12,209.40

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Solution

The fourth proportional to 22,280.76, 30,747.06 and 12,209.40 is: 16,848.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,280.76 : 30,747.06 = 12,209.40 : x
  2. Step 2: Convert to fraction form
    22,280.76/30,747.06 = 12,209.40/x
  3. Step 3: Cross multiply
    22,280.76x = 30,747.06 × 12,209.40
  4. Step 4: Simplify right side
    22,280.76x = 375,403,154.36
  5. Step 5: Solve for x
    x = 375,403,154.36/22,280.76
  6. Step 6: Final answer
    x = 16,848.76

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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.