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Finding the Fourth Proportional to 15,210.14, 20,987.92 and 8,494.91

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Solution

The fourth proportional to 15,210.14, 20,987.92 and 8,494.91 is: 11,721.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,210.14 : 20,987.92 = 8,494.91 : x
  2. Step 2: Convert to fraction form
    15,210.14/20,987.92 = 8,494.91/x
  3. Step 3: Cross multiply
    15,210.14x = 20,987.92 × 8,494.91
  4. Step 4: Simplify right side
    15,210.14x = 178,290,491.49
  5. Step 5: Solve for x
    x = 178,290,491.49/15,210.14
  6. Step 6: Final answer
    x = 11,721.82

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Double scale
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Similar ratio
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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.