Home / 28,172.21-38,878.25-15,425.91

Finding the Fourth Proportional to 28,172.21, 38,878.25 and 15,425.91

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Solution

The fourth proportional to 28,172.21, 38,878.25 and 15,425.91 is: 21,288.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,172.21 : 38,878.25 = 15,425.91 : x
  2. Step 2: Convert to fraction form
    28,172.21/38,878.25 = 15,425.91/x
  3. Step 3: Cross multiply
    28,172.21x = 38,878.25 × 15,425.91
  4. Step 4: Simplify right side
    28,172.21x = 599,732,308.33
  5. Step 5: Solve for x
    x = 599,732,308.33/28,172.21
  6. Step 6: Final answer
    x = 21,288.09

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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.