Home / 28,251.75-38,987.39-15,505.01

Finding the Fourth Proportional to 28,251.75, 38,987.39 and 15,505.01

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Solution

The fourth proportional to 28,251.75, 38,987.39 and 15,505.01 is: 21,396.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,251.75 : 38,987.39 = 15,505.01 : x
  2. Step 2: Convert to fraction form
    28,251.75/38,987.39 = 15,505.01/x
  3. Step 3: Cross multiply
    28,251.75x = 38,987.39 × 15,505.01
  4. Step 4: Simplify right side
    28,251.75x = 604,499,599.36
  5. Step 5: Solve for x
    x = 604,499,599.36/28,251.75
  6. Step 6: Final answer
    x = 21,396.89

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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.