Home / 8,925.20-12,316.32-5,145.68

Finding the Fourth Proportional to 8,925.20, 12,316.32 and 5,145.68

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Solution

The fourth proportional to 8,925.20, 12,316.32 and 5,145.68 is: 7,100.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,925.20 : 12,316.32 = 5,145.68 : x
  2. Step 2: Convert to fraction form
    8,925.20/12,316.32 = 5,145.68/x
  3. Step 3: Cross multiply
    8,925.20x = 12,316.32 × 5,145.68
  4. Step 4: Simplify right side
    8,925.20x = 63,375,841.50
  5. Step 5: Solve for x
    x = 63,375,841.50/8,925.20
  6. Step 6: Final answer
    x = 7,100.78

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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.