Home / 28,453.68-39,265.98-15,878.42

Finding the Fourth Proportional to 28,453.68, 39,265.98 and 15,878.42

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Solution

The fourth proportional to 28,453.68, 39,265.98 and 15,878.42 is: 21,912.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,453.68 : 39,265.98 = 15,878.42 : x
  2. Step 2: Convert to fraction form
    28,453.68/39,265.98 = 15,878.42/x
  3. Step 3: Cross multiply
    28,453.68x = 39,265.98 × 15,878.42
  4. Step 4: Simplify right side
    28,453.68x = 623,481,722.15
  5. Step 5: Solve for x
    x = 623,481,722.15/28,453.68
  6. Step 6: Final answer
    x = 21,912.16

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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.