Home / 28,438.06-42,680.28-20,126.08

Finding the Fourth Proportional to 28,438.06, 42,680.28 and 20,126.08

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Solution

The fourth proportional to 28,438.06, 42,680.28 and 20,126.08 is: 30,205.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,438.06 : 42,680.28 = 20,126.08 : x
  2. Step 2: Convert to fraction form
    28,438.06/42,680.28 = 20,126.08/x
  3. Step 3: Cross multiply
    28,438.06x = 42,680.28 × 20,126.08
  4. Step 4: Simplify right side
    28,438.06x = 858,986,729.70
  5. Step 5: Solve for x
    x = 858,986,729.70/28,438.06
  6. Step 6: Final answer
    x = 30,205.53

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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.