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Finding the Fourth Proportional to 18,645.59, 25,731.53 and 10,689.32

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Solution

The fourth proportional to 18,645.59, 25,731.53 and 10,689.32 is: 14,751.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,645.59 : 25,731.53 = 10,689.32 : x
  2. Step 2: Convert to fraction form
    18,645.59/25,731.53 = 10,689.32/x
  3. Step 3: Cross multiply
    18,645.59x = 25,731.53 × 10,689.32
  4. Step 4: Simplify right side
    18,645.59x = 275,052,609.23
  5. Step 5: Solve for x
    x = 275,052,609.23/18,645.59
  6. Step 6: Final answer
    x = 14,751.62

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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.