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Finding the Fourth Proportional to 28,476.72, 42,713.87 and 8,754.44

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Solution

The fourth proportional to 28,476.72, 42,713.87 and 8,754.44 is: 13,131.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,476.72 : 42,713.87 = 8,754.44 : x
  2. Step 2: Convert to fraction form
    28,476.72/42,713.87 = 8,754.44/x
  3. Step 3: Cross multiply
    28,476.72x = 42,713.87 × 8,754.44
  4. Step 4: Simplify right side
    28,476.72x = 373,935,754.74
  5. Step 5: Solve for x
    x = 373,935,754.74/28,476.72
  6. Step 6: Final answer
    x = 13,131.28

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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.