Home / 15,081.48-20,812.20-8,275.56

Finding the Fourth Proportional to 15,081.48, 20,812.20 and 8,275.56

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Solution

The fourth proportional to 15,081.48, 20,812.20 and 8,275.56 is: 11,420.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,081.48 : 20,812.20 = 8,275.56 : x
  2. Step 2: Convert to fraction form
    15,081.48/20,812.20 = 8,275.56/x
  3. Step 3: Cross multiply
    15,081.48x = 20,812.20 × 8,275.56
  4. Step 4: Simplify right side
    15,081.48x = 172,232,609.83
  5. Step 5: Solve for x
    x = 172,232,609.83/15,081.48
  6. Step 6: Final answer
    x = 11,420.14

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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.