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Finding the Fourth Proportional to 8,828.80, 13,239.92 and 2,587.21

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Solution

The fourth proportional to 8,828.80, 13,239.92 and 2,587.21 is: 3,879.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,828.80 : 13,239.92 = 2,587.21 : x
  2. Step 2: Convert to fraction form
    8,828.80/13,239.92 = 2,587.21/x
  3. Step 3: Cross multiply
    8,828.80x = 13,239.92 × 2,587.21
  4. Step 4: Simplify right side
    8,828.80x = 34,254,426.79
  5. Step 5: Solve for x
    x = 34,254,426.79/8,828.80
  6. Step 6: Final answer
    x = 3,879.85

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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.