Home / 8,531.20-11,775.12-5,698.72

Finding the Fourth Proportional to 8,531.20, 11,775.12 and 5,698.72

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Solution

The fourth proportional to 8,531.20, 11,775.12 and 5,698.72 is: 7,865.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,531.20 : 11,775.12 = 5,698.72 : x
  2. Step 2: Convert to fraction form
    8,531.20/11,775.12 = 5,698.72/x
  3. Step 3: Cross multiply
    8,531.20x = 11,775.12 × 5,698.72
  4. Step 4: Simplify right side
    8,531.20x = 67,103,111.85
  5. Step 5: Solve for x
    x = 67,103,111.85/8,531.20
  6. Step 6: Final answer
    x = 7,865.61

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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.