Home / 28,172.72-38,878.96-15,426.44

Finding the Fourth Proportional to 28,172.72, 38,878.96 and 15,426.44

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Solution

The fourth proportional to 28,172.72, 38,878.96 and 15,426.44 is: 21,288.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,172.72 : 38,878.96 = 15,426.44 : x
  2. Step 2: Convert to fraction form
    28,172.72/38,878.96 = 15,426.44/x
  3. Step 3: Cross multiply
    28,172.72x = 38,878.96 × 15,426.44
  4. Step 4: Simplify right side
    28,172.72x = 599,763,943.70
  5. Step 5: Solve for x
    x = 599,763,943.70/28,172.72
  6. Step 6: Final answer
    x = 21,288.82

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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.