Home / 12,988.96-19,481.31-5,591.43

Finding the Fourth Proportional to 12,988.96, 19,481.31 and 5,591.43

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Solution

The fourth proportional to 12,988.96, 19,481.31 and 5,591.43 is: 8,386.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,988.96 : 19,481.31 = 5,591.43 : x
  2. Step 2: Convert to fraction form
    12,988.96/19,481.31 = 5,591.43/x
  3. Step 3: Cross multiply
    12,988.96x = 19,481.31 × 5,591.43
  4. Step 4: Simplify right side
    12,988.96x = 108,928,381.17
  5. Step 5: Solve for x
    x = 108,928,381.17/12,988.96
  6. Step 6: Final answer
    x = 8,386.23

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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.