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Finding the Fourth Proportional to 20,012.70, 30,040.65 and 11,264.70

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Solution

The fourth proportional to 20,012.70, 30,040.65 and 11,264.70 is: 16,909.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,012.70 : 30,040.65 = 11,264.70 : x
  2. Step 2: Convert to fraction form
    20,012.70/30,040.65 = 11,264.70/x
  3. Step 3: Cross multiply
    20,012.70x = 30,040.65 × 11,264.70
  4. Step 4: Simplify right side
    20,012.70x = 338,398,910.06
  5. Step 5: Solve for x
    x = 338,398,910.06/20,012.70
  6. Step 6: Final answer
    x = 16,909.21

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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.