Home / 9,789.66-13,510.80-5,811.75

Finding the Fourth Proportional to 9,789.66, 13,510.80 and 5,811.75

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Solution

The fourth proportional to 9,789.66, 13,510.80 and 5,811.75 is: 8,020.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,789.66 : 13,510.80 = 5,811.75 : x
  2. Step 2: Convert to fraction form
    9,789.66/13,510.80 = 5,811.75/x
  3. Step 3: Cross multiply
    9,789.66x = 13,510.80 × 5,811.75
  4. Step 4: Simplify right side
    9,789.66x = 78,521,391.90
  5. Step 5: Solve for x
    x = 78,521,391.90/9,789.66
  6. Step 6: Final answer
    x = 8,020.85

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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.