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Finding the Fourth Proportional to 21,621.99, 32,447.57 and 8,472.72

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Solution

The fourth proportional to 21,621.99, 32,447.57 and 8,472.72 is: 12,714.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,621.99 : 32,447.57 = 8,472.72 : x
  2. Step 2: Convert to fraction form
    21,621.99/32,447.57 = 8,472.72/x
  3. Step 3: Cross multiply
    21,621.99x = 32,447.57 × 8,472.72
  4. Step 4: Simplify right side
    21,621.99x = 274,919,132.93
  5. Step 5: Solve for x
    x = 274,919,132.93/21,621.99
  6. Step 6: Final answer
    x = 12,714.79

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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.