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Finding the Fourth Proportional to 18,580.19, 27,878.48 and 8,718.64

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Solution

The fourth proportional to 18,580.19, 27,878.48 and 8,718.64 is: 13,081.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,580.19 : 27,878.48 = 8,718.64 : x
  2. Step 2: Convert to fraction form
    18,580.19/27,878.48 = 8,718.64/x
  3. Step 3: Cross multiply
    18,580.19x = 27,878.48 × 8,718.64
  4. Step 4: Simplify right side
    18,580.19x = 243,062,350.27
  5. Step 5: Solve for x
    x = 243,062,350.27/18,580.19
  6. Step 6: Final answer
    x = 13,081.80

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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.