Home / 20,820.48-28,732.26-11,389.02

Finding the Fourth Proportional to 20,820.48, 28,732.26 and 11,389.02

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Solution

The fourth proportional to 20,820.48, 28,732.26 and 11,389.02 is: 15,716.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,820.48 : 28,732.26 = 11,389.02 : x
  2. Step 2: Convert to fraction form
    20,820.48/28,732.26 = 11,389.02/x
  3. Step 3: Cross multiply
    20,820.48x = 28,732.26 × 11,389.02
  4. Step 4: Simplify right side
    20,820.48x = 327,232,283.79
  5. Step 5: Solve for x
    x = 327,232,283.79/20,820.48
  6. Step 6: Final answer
    x = 15,716.85

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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.