Home / 28,172.92-38,878.48-15,425.87

Finding the Fourth Proportional to 28,172.92, 38,878.48 and 15,425.87

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Solution

The fourth proportional to 28,172.92, 38,878.48 and 15,425.87 is: 21,287.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,172.92 : 38,878.48 = 15,425.87 : x
  2. Step 2: Convert to fraction form
    28,172.92/38,878.48 = 15,425.87/x
  3. Step 3: Cross multiply
    28,172.92x = 38,878.48 × 15,425.87
  4. Step 4: Simplify right side
    28,172.92x = 599,734,368.24
  5. Step 5: Solve for x
    x = 599,734,368.24/28,172.92
  6. Step 6: Final answer
    x = 21,287.62

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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.