Home / 21,278.69-29,365.50-11,847.25

Finding the Fourth Proportional to 21,278.69, 29,365.50 and 11,847.25

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Solution

The fourth proportional to 21,278.69, 29,365.50 and 11,847.25 is: 16,349.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,278.69 : 29,365.50 = 11,847.25 : x
  2. Step 2: Convert to fraction form
    21,278.69/29,365.50 = 11,847.25/x
  3. Step 3: Cross multiply
    21,278.69x = 29,365.50 × 11,847.25
  4. Step 4: Simplify right side
    21,278.69x = 347,900,419.88
  5. Step 5: Solve for x
    x = 347,900,419.88/21,278.69
  6. Step 6: Final answer
    x = 16,349.71

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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.