Home / 8,781.35-12,118.59-5,005.11

Finding the Fourth Proportional to 8,781.35, 12,118.59 and 5,005.11

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Solution

The fourth proportional to 8,781.35, 12,118.59 and 5,005.11 is: 6,907.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,781.35 : 12,118.59 = 5,005.11 : x
  2. Step 2: Convert to fraction form
    8,781.35/12,118.59 = 5,005.11/x
  3. Step 3: Cross multiply
    8,781.35x = 12,118.59 × 5,005.11
  4. Step 4: Simplify right side
    8,781.35x = 60,654,875.99
  5. Step 5: Solve for x
    x = 60,654,875.99/8,781.35
  6. Step 6: Final answer
    x = 6,907.24

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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.