Home / 21,299.04-31,882.86-13,887.54

Finding the Fourth Proportional to 21,299.04, 31,882.86 and 13,887.54

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Solution

The fourth proportional to 21,299.04, 31,882.86 and 13,887.54 is: 20,788.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,299.04 : 31,882.86 = 13,887.54 : x
  2. Step 2: Convert to fraction form
    21,299.04/31,882.86 = 13,887.54/x
  3. Step 3: Cross multiply
    21,299.04x = 31,882.86 × 13,887.54
  4. Step 4: Simplify right side
    21,299.04x = 442,774,493.56
  5. Step 5: Solve for x
    x = 442,774,493.56/21,299.04
  6. Step 6: Final answer
    x = 20,788.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.