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Finding the Fourth Proportional to 15,016.18, 20,721.68 and 8,210.08

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Solution

The fourth proportional to 15,016.18, 20,721.68 and 8,210.08 is: 11,329.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,016.18 : 20,721.68 = 8,210.08 : x
  2. Step 2: Convert to fraction form
    15,016.18/20,721.68 = 8,210.08/x
  3. Step 3: Cross multiply
    15,016.18x = 20,721.68 × 8,210.08
  4. Step 4: Simplify right side
    15,016.18x = 170,126,689.14
  5. Step 5: Solve for x
    x = 170,126,689.14/15,016.18
  6. Step 6: Final answer
    x = 11,329.56

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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.