Home / 20,343.76-28,074.08-11,391.59

Finding the Fourth Proportional to 20,343.76, 28,074.08 and 11,391.59

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Solution

The fourth proportional to 20,343.76, 28,074.08 and 11,391.59 is: 15,720.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,343.76 : 28,074.08 = 11,391.59 : x
  2. Step 2: Convert to fraction form
    20,343.76/28,074.08 = 11,391.59/x
  3. Step 3: Cross multiply
    20,343.76x = 28,074.08 × 11,391.59
  4. Step 4: Simplify right side
    20,343.76x = 319,808,285.66
  5. Step 5: Solve for x
    x = 319,808,285.66/20,343.76
  6. Step 6: Final answer
    x = 15,720.22

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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.