Home / 14,108.10-19,470.90-8,139.78

Finding the Fourth Proportional to 14,108.10, 19,470.90 and 8,139.78

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Solution

The fourth proportional to 14,108.10, 19,470.90 and 8,139.78 is: 11,233.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,108.10 : 19,470.90 = 8,139.78 : x
  2. Step 2: Convert to fraction form
    14,108.10/19,470.90 = 8,139.78/x
  3. Step 3: Cross multiply
    14,108.10x = 19,470.90 × 8,139.78
  4. Step 4: Simplify right side
    14,108.10x = 158,488,842.40
  5. Step 5: Solve for x
    x = 158,488,842.40/14,108.10
  6. Step 6: Final answer
    x = 11,233.89

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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.