Home / 12,720.71-19,074.66-7,456.97

Finding the Fourth Proportional to 12,720.71, 19,074.66 and 7,456.97

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Solution

The fourth proportional to 12,720.71, 19,074.66 and 7,456.97 is: 11,181.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,720.71 : 19,074.66 = 7,456.97 : x
  2. Step 2: Convert to fraction form
    12,720.71/19,074.66 = 7,456.97/x
  3. Step 3: Cross multiply
    12,720.71x = 19,074.66 × 7,456.97
  4. Step 4: Simplify right side
    12,720.71x = 142,239,187.10
  5. Step 5: Solve for x
    x = 142,239,187.10/12,720.71
  6. Step 6: Final answer
    x = 11,181.70

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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.