Home / 21,291.75-29,382.75-11,860.38

Finding the Fourth Proportional to 21,291.75, 29,382.75 and 11,860.38

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Solution

The fourth proportional to 21,291.75, 29,382.75 and 11,860.38 is: 16,367.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,291.75 : 29,382.75 = 11,860.38 : x
  2. Step 2: Convert to fraction form
    21,291.75/29,382.75 = 11,860.38/x
  3. Step 3: Cross multiply
    21,291.75x = 29,382.75 × 11,860.38
  4. Step 4: Simplify right side
    21,291.75x = 348,490,580.45
  5. Step 5: Solve for x
    x = 348,490,580.45/21,291.75
  6. Step 6: Final answer
    x = 16,367.40

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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.