Home / 21,119.74-29,157.37-15,771.66

Finding the Fourth Proportional to 21,119.74, 29,157.37 and 15,771.66

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Solution

The fourth proportional to 21,119.74, 29,157.37 and 15,771.66 is: 21,773.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,119.74 : 29,157.37 = 15,771.66 : x
  2. Step 2: Convert to fraction form
    21,119.74/29,157.37 = 15,771.66/x
  3. Step 3: Cross multiply
    21,119.74x = 29,157.37 × 15,771.66
  4. Step 4: Simplify right side
    21,119.74x = 459,860,141.38
  5. Step 5: Solve for x
    x = 459,860,141.38/21,119.74
  6. Step 6: Final answer
    x = 21,773.95

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Double scale
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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.