Home / 21,285.72-31,906.98-10,176.12

Finding the Fourth Proportional to 21,285.72, 31,906.98 and 10,176.12

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Solution

The fourth proportional to 21,285.72, 31,906.98 and 10,176.12 is: 15,253.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,285.72 : 31,906.98 = 10,176.12 : x
  2. Step 2: Convert to fraction form
    21,285.72/31,906.98 = 10,176.12/x
  3. Step 3: Cross multiply
    21,285.72x = 31,906.98 × 10,176.12
  4. Step 4: Simplify right side
    21,285.72x = 324,689,257.32
  5. Step 5: Solve for x
    x = 324,689,257.32/21,285.72
  6. Step 6: Final answer
    x = 15,253.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.