Home / 7,711.18-11,565.45-2,780.11

Finding the Fourth Proportional to 7,711.18, 11,565.45 and 2,780.11

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Solution

The fourth proportional to 7,711.18, 11,565.45 and 2,780.11 is: 4,169.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,711.18 : 11,565.45 = 2,780.11 : x
  2. Step 2: Convert to fraction form
    7,711.18/11,565.45 = 2,780.11/x
  3. Step 3: Cross multiply
    7,711.18x = 11,565.45 × 2,780.11
  4. Step 4: Simplify right side
    7,711.18x = 32,153,172.60
  5. Step 5: Solve for x
    x = 32,153,172.60/7,711.18
  6. Step 6: Final answer
    x = 4,169.68

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.