Home / 14,778.18-20,391.75-8,489.34

Finding the Fourth Proportional to 14,778.18, 20,391.75 and 8,489.34

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Solution

The fourth proportional to 14,778.18, 20,391.75 and 8,489.34 is: 11,714.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,778.18 : 20,391.75 = 8,489.34 : x
  2. Step 2: Convert to fraction form
    14,778.18/20,391.75 = 8,489.34/x
  3. Step 3: Cross multiply
    14,778.18x = 20,391.75 × 8,489.34
  4. Step 4: Simplify right side
    14,778.18x = 173,112,498.95
  5. Step 5: Solve for x
    x = 173,112,498.95/14,778.18
  6. Step 6: Final answer
    x = 11,714.06

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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.