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Finding the Fourth Proportional to 20,015.76, 30,011.64 and 8,916.88

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Solution

The fourth proportional to 20,015.76, 30,011.64 and 8,916.88 is: 13,369.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,015.76 : 30,011.64 = 8,916.88 : x
  2. Step 2: Convert to fraction form
    20,015.76/30,011.64 = 8,916.88/x
  3. Step 3: Cross multiply
    20,015.76x = 30,011.64 × 8,916.88
  4. Step 4: Simplify right side
    20,015.76x = 267,610,192.48
  5. Step 5: Solve for x
    x = 267,610,192.48/20,015.76
  6. Step 6: Final answer
    x = 13,369.97

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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.