Home / 9,120.60-12,585.78-5,141.68

Finding the Fourth Proportional to 9,120.60, 12,585.78 and 5,141.68

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Solution

The fourth proportional to 9,120.60, 12,585.78 and 5,141.68 is: 7,095.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,120.60 : 12,585.78 = 5,141.68 : x
  2. Step 2: Convert to fraction form
    9,120.60/12,585.78 = 5,141.68/x
  3. Step 3: Cross multiply
    9,120.60x = 12,585.78 × 5,141.68
  4. Step 4: Simplify right side
    9,120.60x = 64,712,021.85
  5. Step 5: Solve for x
    x = 64,712,021.85/9,120.60
  6. Step 6: Final answer
    x = 7,095.15

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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.