Home / 15,431.25-21,296.43-8,718.11

Finding the Fourth Proportional to 15,431.25, 21,296.43 and 8,718.11

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Solution

The fourth proportional to 15,431.25, 21,296.43 and 8,718.11 is: 12,031.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,431.25 : 21,296.43 = 8,718.11 : x
  2. Step 2: Convert to fraction form
    15,431.25/21,296.43 = 8,718.11/x
  3. Step 3: Cross multiply
    15,431.25x = 21,296.43 × 8,718.11
  4. Step 4: Simplify right side
    15,431.25x = 185,664,512.87
  5. Step 5: Solve for x
    x = 185,664,512.87/15,431.25
  6. Step 6: Final answer
    x = 12,031.73

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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.