Home / 8,781.89-13,172.84-3,587.77

Finding the Fourth Proportional to 8,781.89, 13,172.84 and 3,587.77

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Solution

The fourth proportional to 8,781.89, 13,172.84 and 3,587.77 is: 5,381.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,781.89 : 13,172.84 = 3,587.77 : x
  2. Step 2: Convert to fraction form
    8,781.89/13,172.84 = 3,587.77/x
  3. Step 3: Cross multiply
    8,781.89x = 13,172.84 × 3,587.77
  4. Step 4: Simplify right side
    8,781.89x = 47,261,036.36
  5. Step 5: Solve for x
    x = 47,261,036.36/8,781.89
  6. Step 6: Final answer
    x = 5,381.65

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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.