Home / 20,395.12-28,144.02-11,440.96

Finding the Fourth Proportional to 20,395.12, 28,144.02 and 11,440.96

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Solution

The fourth proportional to 20,395.12, 28,144.02 and 11,440.96 is: 15,787.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,395.12 : 28,144.02 = 11,440.96 : x
  2. Step 2: Convert to fraction form
    20,395.12/28,144.02 = 11,440.96/x
  3. Step 3: Cross multiply
    20,395.12x = 28,144.02 × 11,440.96
  4. Step 4: Simplify right side
    20,395.12x = 321,994,607.06
  5. Step 5: Solve for x
    x = 321,994,607.06/20,395.12
  6. Step 6: Final answer
    x = 15,787.83

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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.