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Finding the Fourth Proportional to 22,402.79, 30,915.60 and 12,331.01

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Solution

The fourth proportional to 22,402.79, 30,915.60 and 12,331.01 is: 17,016.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,402.79 : 30,915.60 = 12,331.01 : x
  2. Step 2: Convert to fraction form
    22,402.79/30,915.60 = 12,331.01/x
  3. Step 3: Cross multiply
    22,402.79x = 30,915.60 × 12,331.01
  4. Step 4: Simplify right side
    22,402.79x = 381,220,572.76
  5. Step 5: Solve for x
    x = 381,220,572.76/22,402.79
  6. Step 6: Final answer
    x = 17,016.66

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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.