Home / 28,330.11-42,659.80-20,986.65

Finding the Fourth Proportional to 28,330.11, 42,659.80 and 20,986.65

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Solution

The fourth proportional to 28,330.11, 42,659.80 and 20,986.65 is: 31,601.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,330.11 : 42,659.80 = 20,986.65 : x
  2. Step 2: Convert to fraction form
    28,330.11/42,659.80 = 20,986.65/x
  3. Step 3: Cross multiply
    28,330.11x = 42,659.80 × 20,986.65
  4. Step 4: Simplify right side
    28,330.11x = 895,286,239.20
  5. Step 5: Solve for x
    x = 895,286,239.20/28,330.11
  6. Step 6: Final answer
    x = 31,601.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.