Home / 12,456.70-18,685.10-3,692.29

Finding the Fourth Proportional to 12,456.70, 18,685.10 and 3,692.29

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Solution

The fourth proportional to 12,456.70, 18,685.10 and 3,692.29 is: 5,538.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,456.70 : 18,685.10 = 3,692.29 : x
  2. Step 2: Convert to fraction form
    12,456.70/18,685.10 = 3,692.29/x
  3. Step 3: Cross multiply
    12,456.70x = 18,685.10 × 3,692.29
  4. Step 4: Simplify right side
    12,456.70x = 68,990,807.88
  5. Step 5: Solve for x
    x = 68,990,807.88/12,456.70
  6. Step 6: Final answer
    x = 5,538.45

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1.5x scale

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.