Home / 28,171.15-38,876.69-15,424.36

Finding the Fourth Proportional to 28,171.15, 38,876.69 and 15,424.36

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Solution

The fourth proportional to 28,171.15, 38,876.69 and 15,424.36 is: 21,285.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,171.15 : 38,876.69 = 15,424.36 : x
  2. Step 2: Convert to fraction form
    28,171.15/38,876.69 = 15,424.36/x
  3. Step 3: Cross multiply
    28,171.15x = 38,876.69 × 15,424.36
  4. Step 4: Simplify right side
    28,171.15x = 599,648,003.54
  5. Step 5: Solve for x
    x = 599,648,003.54/28,171.15
  6. Step 6: Final answer
    x = 21,285.89

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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.