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Finding the Fourth Proportional to 15,014.20, 20,720.94 and 8,301.40

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Solution

The fourth proportional to 15,014.20, 20,720.94 and 8,301.40 is: 11,456.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,014.20 : 20,720.94 = 8,301.40 : x
  2. Step 2: Convert to fraction form
    15,014.20/20,720.94 = 8,301.40/x
  3. Step 3: Cross multiply
    15,014.20x = 20,720.94 × 8,301.40
  4. Step 4: Simplify right side
    15,014.20x = 172,012,811.32
  5. Step 5: Solve for x
    x = 172,012,811.32/15,014.20
  6. Step 6: Final answer
    x = 11,456.68

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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.