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Finding the Fourth Proportional to 18,687.63, 25,788.81 and 10,304.13

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Solution

The fourth proportional to 18,687.63, 25,788.81 and 10,304.13 is: 14,219.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,687.63 : 25,788.81 = 10,304.13 : x
  2. Step 2: Convert to fraction form
    18,687.63/25,788.81 = 10,304.13/x
  3. Step 3: Cross multiply
    18,687.63x = 25,788.81 × 10,304.13
  4. Step 4: Simplify right side
    18,687.63x = 265,731,250.79
  5. Step 5: Solve for x
    x = 265,731,250.79/18,687.63
  6. Step 6: Final answer
    x = 14,219.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.