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Finding the Fourth Proportional to 15,220.92, 21,003.84 and 8,506.20

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Solution

The fourth proportional to 15,220.92, 21,003.84 and 8,506.20 is: 11,737.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,220.92 : 21,003.84 = 8,506.20 : x
  2. Step 2: Convert to fraction form
    15,220.92/21,003.84 = 8,506.20/x
  3. Step 3: Cross multiply
    15,220.92x = 21,003.84 × 8,506.20
  4. Step 4: Simplify right side
    15,220.92x = 178,662,863.81
  5. Step 5: Solve for x
    x = 178,662,863.81/15,220.92
  6. Step 6: Final answer
    x = 11,737.98

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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.