Home / 13,759.20-18,990.72-9,043.92

Finding the Fourth Proportional to 13,759.20, 18,990.72 and 9,043.92

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Solution

The fourth proportional to 13,759.20, 18,990.72 and 9,043.92 is: 12,482.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,759.20 : 18,990.72 = 9,043.92 : x
  2. Step 2: Convert to fraction form
    13,759.20/18,990.72 = 9,043.92/x
  3. Step 3: Cross multiply
    13,759.20x = 18,990.72 × 9,043.92
  4. Step 4: Simplify right side
    13,759.20x = 171,750,552.42
  5. Step 5: Solve for x
    x = 171,750,552.42/13,759.20
  6. Step 6: Final answer
    x = 12,482.60

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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.