Home / 15,118.47-20,863.49-8,403.90

Finding the Fourth Proportional to 15,118.47, 20,863.49 and 8,403.90

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Solution

The fourth proportional to 15,118.47, 20,863.49 and 8,403.90 is: 11,597.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,118.47 : 20,863.49 = 8,403.90 : x
  2. Step 2: Convert to fraction form
    15,118.47/20,863.49 = 8,403.90/x
  3. Step 3: Cross multiply
    15,118.47x = 20,863.49 × 8,403.90
  4. Step 4: Simplify right side
    15,118.47x = 175,334,641.59
  5. Step 5: Solve for x
    x = 175,334,641.59/15,118.47
  6. Step 6: Final answer
    x = 11,597.38

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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.