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Finding the Fourth Proportional to 8,712.32, 12,023.16 and 4,986.32

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Solution

The fourth proportional to 8,712.32, 12,023.16 and 4,986.32 is: 6,881.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,712.32 : 12,023.16 = 4,986.32 : x
  2. Step 2: Convert to fraction form
    8,712.32/12,023.16 = 4,986.32/x
  3. Step 3: Cross multiply
    8,712.32x = 12,023.16 × 4,986.32
  4. Step 4: Simplify right side
    8,712.32x = 59,951,323.17
  5. Step 5: Solve for x
    x = 59,951,323.17/8,712.32
  6. Step 6: Final answer
    x = 6,881.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.