Home / 21,275.76-31,912.83-8,625.09

Finding the Fourth Proportional to 21,275.76, 31,912.83 and 8,625.09

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Solution

The fourth proportional to 21,275.76, 31,912.83 and 8,625.09 is: 12,937.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,275.76 : 31,912.83 = 8,625.09 : x
  2. Step 2: Convert to fraction form
    21,275.76/31,912.83 = 8,625.09/x
  3. Step 3: Cross multiply
    21,275.76x = 31,912.83 × 8,625.09
  4. Step 4: Simplify right side
    21,275.76x = 275,251,030.90
  5. Step 5: Solve for x
    x = 275,251,030.90/21,275.76
  6. Step 6: Final answer
    x = 12,937.31

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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.