Home / 15,747.39-21,731.40-8,673.75

Finding the Fourth Proportional to 15,747.39, 21,731.40 and 8,673.75

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Solution

The fourth proportional to 15,747.39, 21,731.40 and 8,673.75 is: 11,969.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,747.39 : 21,731.40 = 8,673.75 : x
  2. Step 2: Convert to fraction form
    15,747.39/21,731.40 = 8,673.75/x
  3. Step 3: Cross multiply
    15,747.39x = 21,731.40 × 8,673.75
  4. Step 4: Simplify right side
    15,747.39x = 188,492,730.75
  5. Step 5: Solve for x
    x = 188,492,730.75/15,747.39
  6. Step 6: Final answer
    x = 11,969.78

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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.