Home / 28,013.88-38,660.94-15,439.80

Finding the Fourth Proportional to 28,013.88, 38,660.94 and 15,439.80

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Solution

The fourth proportional to 28,013.88, 38,660.94 and 15,439.80 is: 21,307.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,013.88 : 38,660.94 = 15,439.80 : x
  2. Step 2: Convert to fraction form
    28,013.88/38,660.94 = 15,439.80/x
  3. Step 3: Cross multiply
    28,013.88x = 38,660.94 × 15,439.80
  4. Step 4: Simplify right side
    28,013.88x = 596,917,181.41
  5. Step 5: Solve for x
    x = 596,917,181.41/28,013.88
  6. Step 6: Final answer
    x = 21,307.91

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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.