Home / 20,311.89-28,030.34-11,359.37

Finding the Fourth Proportional to 20,311.89, 28,030.34 and 11,359.37

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Solution

The fourth proportional to 20,311.89, 28,030.34 and 11,359.37 is: 15,675.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,311.89 : 28,030.34 = 11,359.37 : x
  2. Step 2: Convert to fraction form
    20,311.89/28,030.34 = 11,359.37/x
  3. Step 3: Cross multiply
    20,311.89x = 28,030.34 × 11,359.37
  4. Step 4: Simplify right side
    20,311.89x = 318,406,806.34
  5. Step 5: Solve for x
    x = 318,406,806.34/20,311.89
  6. Step 6: Final answer
    x = 15,675.88

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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.