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Finding the Fourth Proportional to 15,013.22, 20,719.32 and 8,298.71

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Solution

The fourth proportional to 15,013.22, 20,719.32 and 8,298.71 is: 11,452.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,013.22 : 20,719.32 = 8,298.71 : x
  2. Step 2: Convert to fraction form
    15,013.22/20,719.32 = 8,298.71/x
  3. Step 3: Cross multiply
    15,013.22x = 20,719.32 × 8,298.71
  4. Step 4: Simplify right side
    15,013.22x = 171,943,524.48
  5. Step 5: Solve for x
    x = 171,943,524.48/15,013.22
  6. Step 6: Final answer
    x = 11,452.81

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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.