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Finding the Fourth Proportional to 20,389.95, 30,587.97 and 7,241.22

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Solution

The fourth proportional to 20,389.95, 30,587.97 and 7,241.22 is: 10,862.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,389.95 : 30,587.97 = 7,241.22 : x
  2. Step 2: Convert to fraction form
    20,389.95/30,587.97 = 7,241.22/x
  3. Step 3: Cross multiply
    20,389.95x = 30,587.97 × 7,241.22
  4. Step 4: Simplify right side
    20,389.95x = 221,494,220.12
  5. Step 5: Solve for x
    x = 221,494,220.12/20,389.95
  6. Step 6: Final answer
    x = 10,862.91

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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.