Home / 28,013.88-38,660.60-15,438.64

Finding the Fourth Proportional to 28,013.88, 38,660.60 and 15,438.64

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Solution

The fourth proportional to 28,013.88, 38,660.60 and 15,438.64 is: 21,306.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,013.88 : 38,660.60 = 15,438.64 : x
  2. Step 2: Convert to fraction form
    28,013.88/38,660.60 = 15,438.64/x
  3. Step 3: Cross multiply
    28,013.88x = 38,660.60 × 15,438.64
  4. Step 4: Simplify right side
    28,013.88x = 596,867,085.58
  5. Step 5: Solve for x
    x = 596,867,085.58/28,013.88
  6. Step 6: Final answer
    x = 21,306.12

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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.