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Finding the Fourth Proportional to 8,870.92, 13,279.81 and 8,555.49

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Solution

The fourth proportional to 8,870.92, 13,279.81 and 8,555.49 is: 12,807.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,870.92 : 13,279.81 = 8,555.49 : x
  2. Step 2: Convert to fraction form
    8,870.92/13,279.81 = 8,555.49/x
  3. Step 3: Cross multiply
    8,870.92x = 13,279.81 × 8,555.49
  4. Step 4: Simplify right side
    8,870.92x = 113,615,281.66
  5. Step 5: Solve for x
    x = 113,615,281.66/8,870.92
  6. Step 6: Final answer
    x = 12,807.61

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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.