Home / 15,729.92-21,702.40-8,922.82

Finding the Fourth Proportional to 15,729.92, 21,702.40 and 8,922.82

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Solution

The fourth proportional to 15,729.92, 21,702.40 and 8,922.82 is: 12,310.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,729.92 : 21,702.40 = 8,922.82 : x
  2. Step 2: Convert to fraction form
    15,729.92/21,702.40 = 8,922.82/x
  3. Step 3: Cross multiply
    15,729.92x = 21,702.40 × 8,922.82
  4. Step 4: Simplify right side
    15,729.92x = 193,646,669.36
  5. Step 5: Solve for x
    x = 193,646,669.36/15,729.92
  6. Step 6: Final answer
    x = 12,310.72

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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.