Home / 20,369.12-28,071.34-15,885.80

Finding the Fourth Proportional to 20,369.12, 28,071.34 and 15,885.80

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Solution

The fourth proportional to 20,369.12, 28,071.34 and 15,885.80 is: 21,892.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,369.12 : 28,071.34 = 15,885.80 : x
  2. Step 2: Convert to fraction form
    20,369.12/28,071.34 = 15,885.80/x
  3. Step 3: Cross multiply
    20,369.12x = 28,071.34 × 15,885.80
  4. Step 4: Simplify right side
    20,369.12x = 445,935,692.97
  5. Step 5: Solve for x
    x = 445,935,692.97/20,369.12
  6. Step 6: Final answer
    x = 21,892.73

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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.