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Finding the Fourth Proportional to 12,656.66, 18,984.99 and 9,879.17

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Solution

The fourth proportional to 12,656.66, 18,984.99 and 9,879.17 is: 14,818.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,656.66 : 18,984.99 = 9,879.17 : x
  2. Step 2: Convert to fraction form
    12,656.66/18,984.99 = 9,879.17/x
  3. Step 3: Cross multiply
    12,656.66x = 18,984.99 × 9,879.17
  4. Step 4: Simplify right side
    12,656.66x = 187,555,919.93
  5. Step 5: Solve for x
    x = 187,555,919.93/12,656.66
  6. Step 6: Final answer
    x = 14,818.75

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.