Home / 18,947.30-28,440.75-7,860.57

Finding the Fourth Proportional to 18,947.30, 28,440.75 and 7,860.57

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Solution

The fourth proportional to 18,947.30, 28,440.75 and 7,860.57 is: 11,799.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,947.30 : 28,440.75 = 7,860.57 : x
  2. Step 2: Convert to fraction form
    18,947.30/28,440.75 = 7,860.57/x
  3. Step 3: Cross multiply
    18,947.30x = 28,440.75 × 7,860.57
  4. Step 4: Simplify right side
    18,947.30x = 223,560,364.02
  5. Step 5: Solve for x
    x = 223,560,364.02/18,947.30
  6. Step 6: Final answer
    x = 11,799.06

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.