Home / 12,487.26-18,742.23-6,648.78

Finding the Fourth Proportional to 12,487.26, 18,742.23 and 6,648.78

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Solution

The fourth proportional to 12,487.26, 18,742.23 and 6,648.78 is: 9,979.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,487.26 : 18,742.23 = 6,648.78 : x
  2. Step 2: Convert to fraction form
    12,487.26/18,742.23 = 6,648.78/x
  3. Step 3: Cross multiply
    12,487.26x = 18,742.23 × 6,648.78
  4. Step 4: Simplify right side
    12,487.26x = 124,612,963.98
  5. Step 5: Solve for x
    x = 124,612,963.98/12,487.26
  6. Step 6: Final answer
    x = 9,979.21

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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.