Home / 15,743.78-21,726.56-8,670.25

Finding the Fourth Proportional to 15,743.78, 21,726.56 and 8,670.25

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Solution

The fourth proportional to 15,743.78, 21,726.56 and 8,670.25 is: 11,965.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,743.78 : 21,726.56 = 8,670.25 : x
  2. Step 2: Convert to fraction form
    15,743.78/21,726.56 = 8,670.25/x
  3. Step 3: Cross multiply
    15,743.78x = 21,726.56 × 8,670.25
  4. Step 4: Simplify right side
    15,743.78x = 188,374,706.84
  5. Step 5: Solve for x
    x = 188,374,706.84/15,743.78
  6. Step 6: Final answer
    x = 11,965.02

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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.