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Finding the Fourth Proportional to 19,689.90, 29,537.55 and 6,540.90

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Solution

The fourth proportional to 19,689.90, 29,537.55 and 6,540.90 is: 9,812.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,689.90 : 29,537.55 = 6,540.90 : x
  2. Step 2: Convert to fraction form
    19,689.90/29,537.55 = 6,540.90/x
  3. Step 3: Cross multiply
    19,689.90x = 29,537.55 × 6,540.90
  4. Step 4: Simplify right side
    19,689.90x = 193,202,160.80
  5. Step 5: Solve for x
    x = 193,202,160.80/19,689.90
  6. Step 6: Final answer
    x = 9,812.25

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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.