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Finding the Fourth Proportional to 10,089.70, 13,915.49 and 8,956.20

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Solution

The fourth proportional to 10,089.70, 13,915.49 and 8,956.20 is: 12,352.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,089.70 : 13,915.49 = 8,956.20 : x
  2. Step 2: Convert to fraction form
    10,089.70/13,915.49 = 8,956.20/x
  3. Step 3: Cross multiply
    10,089.70x = 13,915.49 × 8,956.20
  4. Step 4: Simplify right side
    10,089.70x = 124,629,841.96
  5. Step 5: Solve for x
    x = 124,629,841.96/10,089.70
  6. Step 6: Final answer
    x = 12,352.19

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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.