Home / 13,759.90-20,535.88-12,431.30

Finding the Fourth Proportional to 13,759.90, 20,535.88 and 12,431.30

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Solution

The fourth proportional to 13,759.90, 20,535.88 and 12,431.30 is: 18,553.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,759.90 : 20,535.88 = 12,431.30 : x
  2. Step 2: Convert to fraction form
    13,759.90/20,535.88 = 12,431.30/x
  3. Step 3: Cross multiply
    13,759.90x = 20,535.88 × 12,431.30
  4. Step 4: Simplify right side
    13,759.90x = 255,287,685.04
  5. Step 5: Solve for x
    x = 255,287,685.04/13,759.90
  6. Step 6: Final answer
    x = 18,553.02

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.