Home / 21,289.98-29,380.14-11,860.80

Finding the Fourth Proportional to 21,289.98, 29,380.14 and 11,860.80

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Solution

The fourth proportional to 21,289.98, 29,380.14 and 11,860.80 is: 16,367.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,289.98 : 29,380.14 = 11,860.80 : x
  2. Step 2: Convert to fraction form
    21,289.98/29,380.14 = 11,860.80/x
  3. Step 3: Cross multiply
    21,289.98x = 29,380.14 × 11,860.80
  4. Step 4: Simplify right side
    21,289.98x = 348,471,964.51
  5. Step 5: Solve for x
    x = 348,471,964.51/21,289.98
  6. Step 6: Final answer
    x = 16,367.89

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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.