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Finding the Fourth Proportional to 28,448.52, 42,672.20 and 8,726.64

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Solution

The fourth proportional to 28,448.52, 42,672.20 and 8,726.64 is: 13,089.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,448.52 : 42,672.20 = 8,726.64 : x
  2. Step 2: Convert to fraction form
    28,448.52/42,672.20 = 8,726.64/x
  3. Step 3: Cross multiply
    28,448.52x = 42,672.20 × 8,726.64
  4. Step 4: Simplify right side
    28,448.52x = 372,384,927.41
  5. Step 5: Solve for x
    x = 372,384,927.41/28,448.52
  6. Step 6: Final answer
    x = 13,089.78

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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.