Home / 8,811.75-12,161.30-5,085.75

Finding the Fourth Proportional to 8,811.75, 12,161.30 and 5,085.75

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Solution

The fourth proportional to 8,811.75, 12,161.30 and 5,085.75 is: 7,018.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,811.75 : 12,161.30 = 5,085.75 : x
  2. Step 2: Convert to fraction form
    8,811.75/12,161.30 = 5,085.75/x
  3. Step 3: Cross multiply
    8,811.75x = 12,161.30 × 5,085.75
  4. Step 4: Simplify right side
    8,811.75x = 61,849,306.05
  5. Step 5: Solve for x
    x = 61,849,306.05/8,811.75
  6. Step 6: Final answer
    x = 7,018.96

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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.