Home / 13,121.79-19,692.14-6,456.84

Finding the Fourth Proportional to 13,121.79, 19,692.14 and 6,456.84

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Solution

The fourth proportional to 13,121.79, 19,692.14 and 6,456.84 is: 9,689.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,121.79 : 19,692.14 = 6,456.84 : x
  2. Step 2: Convert to fraction form
    13,121.79/19,692.14 = 6,456.84/x
  3. Step 3: Cross multiply
    13,121.79x = 19,692.14 × 6,456.84
  4. Step 4: Simplify right side
    13,121.79x = 127,148,964.95
  5. Step 5: Solve for x
    x = 127,148,964.95/13,121.79
  6. Step 6: Final answer
    x = 9,689.91

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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.