Home / 21,218.88-29,281.28-11,788.06

Finding the Fourth Proportional to 21,218.88, 29,281.28 and 11,788.06

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Solution

The fourth proportional to 21,218.88, 29,281.28 and 11,788.06 is: 16,267.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,218.88 : 29,281.28 = 11,788.06 : x
  2. Step 2: Convert to fraction form
    21,218.88/29,281.28 = 11,788.06/x
  3. Step 3: Cross multiply
    21,218.88x = 29,281.28 × 11,788.06
  4. Step 4: Simplify right side
    21,218.88x = 345,169,485.52
  5. Step 5: Solve for x
    x = 345,169,485.52/21,218.88
  6. Step 6: Final answer
    x = 16,267.09

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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.