Home / 18,965.10-28,436.85-13,122.30

Finding the Fourth Proportional to 18,965.10, 28,436.85 and 13,122.30

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Solution

The fourth proportional to 18,965.10, 28,436.85 and 13,122.30 is: 19,675.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,965.10 : 28,436.85 = 13,122.30 : x
  2. Step 2: Convert to fraction form
    18,965.10/28,436.85 = 13,122.30/x
  3. Step 3: Cross multiply
    18,965.10x = 28,436.85 × 13,122.30
  4. Step 4: Simplify right side
    18,965.10x = 373,156,876.76
  5. Step 5: Solve for x
    x = 373,156,876.76/18,965.10
  6. Step 6: Final answer
    x = 19,675.98

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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.