Home / 28,121.78-38,808.23-15,374.99

Finding the Fourth Proportional to 28,121.78, 38,808.23 and 15,374.99

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Solution

The fourth proportional to 28,121.78, 38,808.23 and 15,374.99 is: 21,217.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,121.78 : 38,808.23 = 15,374.99 : x
  2. Step 2: Convert to fraction form
    28,121.78/38,808.23 = 15,374.99/x
  3. Step 3: Cross multiply
    28,121.78x = 38,808.23 × 15,374.99
  4. Step 4: Simplify right side
    28,121.78x = 596,675,877.25
  5. Step 5: Solve for x
    x = 596,675,877.25/28,121.78
  6. Step 6: Final answer
    x = 21,217.58

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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.