Home / 9,138.75-12,610.11-5,159.77

Finding the Fourth Proportional to 9,138.75, 12,610.11 and 5,159.77

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Solution

The fourth proportional to 9,138.75, 12,610.11 and 5,159.77 is: 7,119.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,138.75 : 12,610.11 = 5,159.77 : x
  2. Step 2: Convert to fraction form
    9,138.75/12,610.11 = 5,159.77/x
  3. Step 3: Cross multiply
    9,138.75x = 12,610.11 × 5,159.77
  4. Step 4: Simplify right side
    9,138.75x = 65,065,267.27
  5. Step 5: Solve for x
    x = 65,065,267.27/9,138.75
  6. Step 6: Final answer
    x = 7,119.72

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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.