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Finding the Fourth Proportional to 8,787.42, 12,120.48 and 8,498.16

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Solution

The fourth proportional to 8,787.42, 12,120.48 and 8,498.16 is: 11,721.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,787.42 : 12,120.48 = 8,498.16 : x
  2. Step 2: Convert to fraction form
    8,787.42/12,120.48 = 8,498.16/x
  3. Step 3: Cross multiply
    8,787.42x = 12,120.48 × 8,498.16
  4. Step 4: Simplify right side
    8,787.42x = 103,001,778.32
  5. Step 5: Solve for x
    x = 103,001,778.32/8,787.42
  6. Step 6: Final answer
    x = 11,721.50

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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.