Home / 15,799.20-21,801.80-8,725.07

Finding the Fourth Proportional to 15,799.20, 21,801.80 and 8,725.07

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Solution

The fourth proportional to 15,799.20, 21,801.80 and 8,725.07 is: 12,039.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,799.20 : 21,801.80 = 8,725.07 : x
  2. Step 2: Convert to fraction form
    15,799.20/21,801.80 = 8,725.07/x
  3. Step 3: Cross multiply
    15,799.20x = 21,801.80 × 8,725.07
  4. Step 4: Simplify right side
    15,799.20x = 190,222,078.49
  5. Step 5: Solve for x
    x = 190,222,078.49/15,799.20
  6. Step 6: Final answer
    x = 12,039.98

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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.