Home / 15,742.78-21,725.18-8,669.25

Finding the Fourth Proportional to 15,742.78, 21,725.18 and 8,669.25

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Solution

The fourth proportional to 15,742.78, 21,725.18 and 8,669.25 is: 11,963.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,742.78 : 21,725.18 = 8,669.25 : x
  2. Step 2: Convert to fraction form
    15,742.78/21,725.18 = 8,669.25/x
  3. Step 3: Cross multiply
    15,742.78x = 21,725.18 × 8,669.25
  4. Step 4: Simplify right side
    15,742.78x = 188,341,005.88
  5. Step 5: Solve for x
    x = 188,341,005.88/15,742.78
  6. Step 6: Final answer
    x = 11,963.65

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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.