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Finding the Fourth Proportional to 8,657.66, 12,991.51 and 8,587.19

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Solution

The fourth proportional to 8,657.66, 12,991.51 and 8,587.19 is: 12,885.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,657.66 : 12,991.51 = 8,587.19 : x
  2. Step 2: Convert to fraction form
    8,657.66/12,991.51 = 8,587.19/x
  3. Step 3: Cross multiply
    8,657.66x = 12,991.51 × 8,587.19
  4. Step 4: Simplify right side
    8,657.66x = 111,560,595.58
  5. Step 5: Solve for x
    x = 111,560,595.58/8,657.66
  6. Step 6: Final answer
    x = 12,885.77

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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.