Home / 20,766.30-28,661.67-13,692.30

Finding the Fourth Proportional to 20,766.30, 28,661.67 and 13,692.30

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Solution

The fourth proportional to 20,766.30, 28,661.67 and 13,692.30 is: 18,898.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,766.30 : 28,661.67 = 13,692.30 : x
  2. Step 2: Convert to fraction form
    20,766.30/28,661.67 = 13,692.30/x
  3. Step 3: Cross multiply
    20,766.30x = 28,661.67 × 13,692.30
  4. Step 4: Simplify right side
    20,766.30x = 392,444,184.14
  5. Step 5: Solve for x
    x = 392,444,184.14/20,766.30
  6. Step 6: Final answer
    x = 18,898.13

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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.