Home / 21,291.28-29,380.80-11,858.16

Finding the Fourth Proportional to 21,291.28, 29,380.80 and 11,858.16

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Solution

The fourth proportional to 21,291.28, 29,380.80 and 11,858.16 is: 16,363.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,291.28 : 29,380.80 = 11,858.16 : x
  2. Step 2: Convert to fraction form
    21,291.28/29,380.80 = 11,858.16/x
  3. Step 3: Cross multiply
    21,291.28x = 29,380.80 × 11,858.16
  4. Step 4: Simplify right side
    21,291.28x = 348,402,227.33
  5. Step 5: Solve for x
    x = 348,402,227.33/21,291.28
  6. Step 6: Final answer
    x = 16,363.61

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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.