Home / 10,257.86-14,155.90-5,781.66

Finding the Fourth Proportional to 10,257.86, 14,155.90 and 5,781.66

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Solution

The fourth proportional to 10,257.86, 14,155.90 and 5,781.66 is: 7,978.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,257.86 : 14,155.90 = 5,781.66 : x
  2. Step 2: Convert to fraction form
    10,257.86/14,155.90 = 5,781.66/x
  3. Step 3: Cross multiply
    10,257.86x = 14,155.90 × 5,781.66
  4. Step 4: Simplify right side
    10,257.86x = 81,844,600.79
  5. Step 5: Solve for x
    x = 81,844,600.79/10,257.86
  6. Step 6: Final answer
    x = 7,978.72

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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.