Home / 20,089.31-27,728.78-12,531.20

Finding the Fourth Proportional to 20,089.31, 27,728.78 and 12,531.20

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Solution

The fourth proportional to 20,089.31, 27,728.78 and 12,531.20 is: 17,296.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,089.31 : 27,728.78 = 12,531.20 : x
  2. Step 2: Convert to fraction form
    20,089.31/27,728.78 = 12,531.20/x
  3. Step 3: Cross multiply
    20,089.31x = 27,728.78 × 12,531.20
  4. Step 4: Simplify right side
    20,089.31x = 347,474,686.64
  5. Step 5: Solve for x
    x = 347,474,686.64/20,089.31
  6. Step 6: Final answer
    x = 17,296.50

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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.