Home / 21,539.91-29,716.64-15,888.11

Finding the Fourth Proportional to 21,539.91, 29,716.64 and 15,888.11

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Solution

The fourth proportional to 21,539.91, 29,716.64 and 15,888.11 is: 21,919.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,539.91 : 29,716.64 = 15,888.11 : x
  2. Step 2: Convert to fraction form
    21,539.91/29,716.64 = 15,888.11/x
  3. Step 3: Cross multiply
    21,539.91x = 29,716.64 × 15,888.11
  4. Step 4: Simplify right side
    21,539.91x = 472,141,245.15
  5. Step 5: Solve for x
    x = 472,141,245.15/21,539.91
  6. Step 6: Final answer
    x = 21,919.37

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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.