Home / 18,868.38-28,315.56-7,775.06

Finding the Fourth Proportional to 18,868.38, 28,315.56 and 7,775.06

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Solution

The fourth proportional to 18,868.38, 28,315.56 and 7,775.06 is: 11,667.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,868.38 : 28,315.56 = 7,775.06 : x
  2. Step 2: Convert to fraction form
    18,868.38/28,315.56 = 7,775.06/x
  3. Step 3: Cross multiply
    18,868.38x = 28,315.56 × 7,775.06
  4. Step 4: Simplify right side
    18,868.38x = 220,155,177.93
  5. Step 5: Solve for x
    x = 220,155,177.93/18,868.38
  6. Step 6: Final answer
    x = 11,667.94

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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.