Home / 15,055.86-20,775.38-8,339.78

Finding the Fourth Proportional to 15,055.86, 20,775.38 and 8,339.78

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Solution

The fourth proportional to 15,055.86, 20,775.38 and 8,339.78 is: 11,507.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,055.86 : 20,775.38 = 8,339.78 : x
  2. Step 2: Convert to fraction form
    15,055.86/20,775.38 = 8,339.78/x
  3. Step 3: Cross multiply
    15,055.86x = 20,775.38 × 8,339.78
  4. Step 4: Simplify right side
    15,055.86x = 173,262,098.62
  5. Step 5: Solve for x
    x = 173,262,098.62/15,055.86
  6. Step 6: Final answer
    x = 11,507.95

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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.