Home / 12,949.72-19,387.65-8,780.75

Finding the Fourth Proportional to 12,949.72, 19,387.65 and 8,780.75

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Solution

The fourth proportional to 12,949.72, 19,387.65 and 8,780.75 is: 13,146.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,949.72 : 19,387.65 = 8,780.75 : x
  2. Step 2: Convert to fraction form
    12,949.72/19,387.65 = 8,780.75/x
  3. Step 3: Cross multiply
    12,949.72x = 19,387.65 × 8,780.75
  4. Step 4: Simplify right side
    12,949.72x = 170,238,107.74
  5. Step 5: Solve for x
    x = 170,238,107.74/12,949.72
  6. Step 6: Final answer
    x = 13,146.08

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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.