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Finding the Fourth Proportional to 20,011.50, 30,013.60 and 8,916.12

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Solution

The fourth proportional to 20,011.50, 30,013.60 and 8,916.12 is: 13,372.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,011.50 : 30,013.60 = 8,916.12 : x
  2. Step 2: Convert to fraction form
    20,011.50/30,013.60 = 8,916.12/x
  3. Step 3: Cross multiply
    20,011.50x = 30,013.60 × 8,916.12
  4. Step 4: Simplify right side
    20,011.50x = 267,604,836.94
  5. Step 5: Solve for x
    x = 267,604,836.94/20,011.50
  6. Step 6: Final answer
    x = 13,372.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.