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Finding the Fourth Proportional to 18,480.53, 27,721.20 and 8,617.16

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Solution

The fourth proportional to 18,480.53, 27,721.20 and 8,617.16 is: 12,925.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,480.53 : 27,721.20 = 8,617.16 : x
  2. Step 2: Convert to fraction form
    18,480.53/27,721.20 = 8,617.16/x
  3. Step 3: Cross multiply
    18,480.53x = 27,721.20 × 8,617.16
  4. Step 4: Simplify right side
    18,480.53x = 238,878,015.79
  5. Step 5: Solve for x
    x = 238,878,015.79/18,480.53
  6. Step 6: Final answer
    x = 12,925.93

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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.