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Finding the Fourth Proportional to 28,407.96, 42,612.06 and 8,686.44

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Solution

The fourth proportional to 28,407.96, 42,612.06 and 8,686.44 is: 13,029.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,407.96 : 42,612.06 = 8,686.44 : x
  2. Step 2: Convert to fraction form
    28,407.96/42,612.06 = 8,686.44/x
  3. Step 3: Cross multiply
    28,407.96x = 42,612.06 × 8,686.44
  4. Step 4: Simplify right side
    28,407.96x = 370,147,102.47
  5. Step 5: Solve for x
    x = 370,147,102.47/28,407.96
  6. Step 6: Final answer
    x = 13,029.70

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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.