Home / 15,132.85-20,879.89-9,163.25

Finding the Fourth Proportional to 15,132.85, 20,879.89 and 9,163.25

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Solution

The fourth proportional to 15,132.85, 20,879.89 and 9,163.25 is: 12,643.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,132.85 : 20,879.89 = 9,163.25 : x
  2. Step 2: Convert to fraction form
    15,132.85/20,879.89 = 9,163.25/x
  3. Step 3: Cross multiply
    15,132.85x = 20,879.89 × 9,163.25
  4. Step 4: Simplify right side
    15,132.85x = 191,327,652.04
  5. Step 5: Solve for x
    x = 191,327,652.04/15,132.85
  6. Step 6: Final answer
    x = 12,643.20

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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.