Home / 21,985.20-30,353.33-16,939.85

Finding the Fourth Proportional to 21,985.20, 30,353.33 and 16,939.85

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Solution

The fourth proportional to 21,985.20, 30,353.33 and 16,939.85 is: 23,387.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,985.20 : 30,353.33 = 16,939.85 : x
  2. Step 2: Convert to fraction form
    21,985.20/30,353.33 = 16,939.85/x
  3. Step 3: Cross multiply
    21,985.20x = 30,353.33 × 16,939.85
  4. Step 4: Simplify right side
    21,985.20x = 514,180,747.78
  5. Step 5: Solve for x
    x = 514,180,747.78/21,985.20
  6. Step 6: Final answer
    x = 23,387.59

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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.