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Finding the Fourth Proportional to 12,480.59, 18,718.86 and 4,160.68

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Solution

The fourth proportional to 12,480.59, 18,718.86 and 4,160.68 is: 6,240.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,480.59 : 18,718.86 = 4,160.68 : x
  2. Step 2: Convert to fraction form
    12,480.59/18,718.86 = 4,160.68/x
  3. Step 3: Cross multiply
    12,480.59x = 18,718.86 × 4,160.68
  4. Step 4: Simplify right side
    12,480.59x = 77,883,155.23
  5. Step 5: Solve for x
    x = 77,883,155.23/12,480.59
  6. Step 6: Final answer
    x = 6,240.34

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Half scale
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Similar ratio
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1.5x scale

Why These Related Problems?

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