Home / 8,387.26-11,628.20-7,920.70

Finding the Fourth Proportional to 8,387.26, 11,628.20 and 7,920.70

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Solution

The fourth proportional to 8,387.26, 11,628.20 and 7,920.70 is: 10,981.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,387.26 : 11,628.20 = 7,920.70 : x
  2. Step 2: Convert to fraction form
    8,387.26/11,628.20 = 7,920.70/x
  3. Step 3: Cross multiply
    8,387.26x = 11,628.20 × 7,920.70
  4. Step 4: Simplify right side
    8,387.26x = 92,103,483.74
  5. Step 5: Solve for x
    x = 92,103,483.74/8,387.26
  6. Step 6: Final answer
    x = 10,981.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.