Home / 20,692.40-31,046.70-8,210.30

Finding the Fourth Proportional to 20,692.40, 31,046.70 and 8,210.30

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Solution

The fourth proportional to 20,692.40, 31,046.70 and 8,210.30 is: 12,318.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,692.40 : 31,046.70 = 8,210.30 : x
  2. Step 2: Convert to fraction form
    20,692.40/31,046.70 = 8,210.30/x
  3. Step 3: Cross multiply
    20,692.40x = 31,046.70 × 8,210.30
  4. Step 4: Simplify right side
    20,692.40x = 254,902,721.01
  5. Step 5: Solve for x
    x = 254,902,721.01/20,692.40
  6. Step 6: Final answer
    x = 12,318.66

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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.