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Finding the Fourth Proportional to 21,855.61, 32,754.39 and 8,700.76

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Solution

The fourth proportional to 21,855.61, 32,754.39 and 8,700.76 is: 13,039.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,855.61 : 32,754.39 = 8,700.76 : x
  2. Step 2: Convert to fraction form
    21,855.61/32,754.39 = 8,700.76/x
  3. Step 3: Cross multiply
    21,855.61x = 32,754.39 × 8,700.76
  4. Step 4: Simplify right side
    21,855.61x = 284,988,086.34
  5. Step 5: Solve for x
    x = 284,988,086.34/21,855.61
  6. Step 6: Final answer
    x = 13,039.59

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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.