Home / 21,290.88-29,378.52-11,858.16

Finding the Fourth Proportional to 21,290.88, 29,378.52 and 11,858.16

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Solution

The fourth proportional to 21,290.88, 29,378.52 and 11,858.16 is: 16,362.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,290.88 : 29,378.52 = 11,858.16 : x
  2. Step 2: Convert to fraction form
    21,290.88/29,378.52 = 11,858.16/x
  3. Step 3: Cross multiply
    21,290.88x = 29,378.52 × 11,858.16
  4. Step 4: Simplify right side
    21,290.88x = 348,375,190.72
  5. Step 5: Solve for x
    x = 348,375,190.72/21,290.88
  6. Step 6: Final answer
    x = 16,362.65

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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.