Home / 28,013.31-38,658.38-15,438.06

Finding the Fourth Proportional to 28,013.31, 38,658.38 and 15,438.06

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Solution

The fourth proportional to 28,013.31, 38,658.38 and 15,438.06 is: 21,304.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,013.31 : 38,658.38 = 15,438.06 : x
  2. Step 2: Convert to fraction form
    28,013.31/38,658.38 = 15,438.06/x
  3. Step 3: Cross multiply
    28,013.31x = 38,658.38 × 15,438.06
  4. Step 4: Simplify right side
    28,013.31x = 596,810,312.75
  5. Step 5: Solve for x
    x = 596,810,312.75/28,013.31
  6. Step 6: Final answer
    x = 21,304.53

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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.