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Finding the Fourth Proportional to 8,666.31, 11,956.14 and 5,307.42

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Solution

The fourth proportional to 8,666.31, 11,956.14 and 5,307.42 is: 7,322.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,666.31 : 11,956.14 = 5,307.42 : x
  2. Step 2: Convert to fraction form
    8,666.31/11,956.14 = 5,307.42/x
  3. Step 3: Cross multiply
    8,666.31x = 11,956.14 × 5,307.42
  4. Step 4: Simplify right side
    8,666.31x = 63,456,256.56
  5. Step 5: Solve for x
    x = 63,456,256.56/8,666.31
  6. Step 6: Final answer
    x = 7,322.18

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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.