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Finding the Fourth Proportional to 18,661.17, 27,969.07 and 8,788.89

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Solution

The fourth proportional to 18,661.17, 27,969.07 and 8,788.89 is: 13,172.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,661.17 : 27,969.07 = 8,788.89 : x
  2. Step 2: Convert to fraction form
    18,661.17/27,969.07 = 8,788.89/x
  3. Step 3: Cross multiply
    18,661.17x = 27,969.07 × 8,788.89
  4. Step 4: Simplify right side
    18,661.17x = 245,817,079.63
  5. Step 5: Solve for x
    x = 245,817,079.63/18,661.17
  6. Step 6: Final answer
    x = 13,172.65

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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.