Home / 21,338.99-29,447.65-12,387.33

Finding the Fourth Proportional to 21,338.99, 29,447.65 and 12,387.33

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Solution

The fourth proportional to 21,338.99, 29,447.65 and 12,387.33 is: 17,094.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,338.99 : 29,447.65 = 12,387.33 : x
  2. Step 2: Convert to fraction form
    21,338.99/29,447.65 = 12,387.33/x
  3. Step 3: Cross multiply
    21,338.99x = 29,447.65 × 12,387.33
  4. Step 4: Simplify right side
    21,338.99x = 364,777,727.31
  5. Step 5: Solve for x
    x = 364,777,727.31/21,338.99
  6. Step 6: Final answer
    x = 17,094.42

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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.