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Finding the Fourth Proportional to 8,312.64, 11,472.87 and 7,938.96

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Solution

The fourth proportional to 8,312.64, 11,472.87 and 7,938.96 is: 10,957.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,312.64 : 11,472.87 = 7,938.96 : x
  2. Step 2: Convert to fraction form
    8,312.64/11,472.87 = 7,938.96/x
  3. Step 3: Cross multiply
    8,312.64x = 11,472.87 × 7,938.96
  4. Step 4: Simplify right side
    8,312.64x = 91,082,656.02
  5. Step 5: Solve for x
    x = 91,082,656.02/8,312.64
  6. Step 6: Final answer
    x = 10,957.13

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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.