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Finding the Fourth Proportional to 28,401.31, 42,602.06 and 8,679.78

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Solution

The fourth proportional to 28,401.31, 42,602.06 and 8,679.78 is: 13,019.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,401.31 : 42,602.06 = 8,679.78 : x
  2. Step 2: Convert to fraction form
    28,401.31/42,602.06 = 8,679.78/x
  3. Step 3: Cross multiply
    28,401.31x = 42,602.06 × 8,679.78
  4. Step 4: Simplify right side
    28,401.31x = 369,776,508.35
  5. Step 5: Solve for x
    x = 369,776,508.35/28,401.31
  6. Step 6: Final answer
    x = 13,019.70

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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.