Home / 20,320.65-28,044.72-11,370.54

Finding the Fourth Proportional to 20,320.65, 28,044.72 and 11,370.54

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Solution

The fourth proportional to 20,320.65, 28,044.72 and 11,370.54 is: 15,692.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,320.65 : 28,044.72 = 11,370.54 : x
  2. Step 2: Convert to fraction form
    20,320.65/28,044.72 = 11,370.54/x
  3. Step 3: Cross multiply
    20,320.65x = 28,044.72 × 11,370.54
  4. Step 4: Simplify right side
    20,320.65x = 318,883,610.55
  5. Step 5: Solve for x
    x = 318,883,610.55/20,320.65
  6. Step 6: Final answer
    x = 15,692.59

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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.