Home / 20,311.61-28,029.72-11,359.03

Finding the Fourth Proportional to 20,311.61, 28,029.72 and 11,359.03

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Solution

The fourth proportional to 20,311.61, 28,029.72 and 11,359.03 is: 15,675.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,311.61 : 28,029.72 = 11,359.03 : x
  2. Step 2: Convert to fraction form
    20,311.61/28,029.72 = 11,359.03/x
  3. Step 3: Cross multiply
    20,311.61x = 28,029.72 × 11,359.03
  4. Step 4: Simplify right side
    20,311.61x = 318,390,360.30
  5. Step 5: Solve for x
    x = 318,390,360.30/20,311.61
  6. Step 6: Final answer
    x = 15,675.29

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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.