Home / 10,407.90-15,613.20-5,145.60

Finding the Fourth Proportional to 10,407.90, 15,613.20 and 5,145.60

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Solution

The fourth proportional to 10,407.90, 15,613.20 and 5,145.60 is: 7,719.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,407.90 : 15,613.20 = 5,145.60 : x
  2. Step 2: Convert to fraction form
    10,407.90/15,613.20 = 5,145.60/x
  3. Step 3: Cross multiply
    10,407.90x = 15,613.20 × 5,145.60
  4. Step 4: Simplify right side
    10,407.90x = 80,339,281.92
  5. Step 5: Solve for x
    x = 80,339,281.92/10,407.90
  6. Step 6: Final answer
    x = 7,719.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.