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Finding the Fourth Proportional to 21,992.40, 32,996.70 and 8,854.20

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Solution

The fourth proportional to 21,992.40, 32,996.70 and 8,854.20 is: 13,284.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,992.40 : 32,996.70 = 8,854.20 : x
  2. Step 2: Convert to fraction form
    21,992.40/32,996.70 = 8,854.20/x
  3. Step 3: Cross multiply
    21,992.40x = 32,996.70 × 8,854.20
  4. Step 4: Simplify right side
    21,992.40x = 292,159,381.14
  5. Step 5: Solve for x
    x = 292,159,381.14/21,992.40
  6. Step 6: Final answer
    x = 13,284.56

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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.