Home / 2,657.80-3,989.67-2,381.86

Finding the Fourth Proportional to 2,657.80, 3,989.67 and 2,381.86

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Solution

The fourth proportional to 2,657.80, 3,989.67 and 2,381.86 is: 3,575.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,657.80 : 3,989.67 = 2,381.86 : x
  2. Step 2: Convert to fraction form
    2,657.80/3,989.67 = 2,381.86/x
  3. Step 3: Cross multiply
    2,657.80x = 3,989.67 × 2,381.86
  4. Step 4: Simplify right side
    2,657.80x = 9,502,835.39
  5. Step 5: Solve for x
    x = 9,502,835.39/2,657.80
  6. Step 6: Final answer
    x = 3,575.45

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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.