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Finding the Fourth Proportional to 20,401.71, 30,605.65 and 7,250.95

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Solution

The fourth proportional to 20,401.71, 30,605.65 and 7,250.95 is: 10,877.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,401.71 : 30,605.65 = 7,250.95 : x
  2. Step 2: Convert to fraction form
    20,401.71/30,605.65 = 7,250.95/x
  3. Step 3: Cross multiply
    20,401.71x = 30,605.65 × 7,250.95
  4. Step 4: Simplify right side
    20,401.71x = 221,920,058.00
  5. Step 5: Solve for x
    x = 221,920,058.00/20,401.71
  6. Step 6: Final answer
    x = 10,877.52

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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.