Home / 21,447.12-29,603.88-13,384.56

Finding the Fourth Proportional to 21,447.12, 29,603.88 and 13,384.56

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Solution

The fourth proportional to 21,447.12, 29,603.88 and 13,384.56 is: 18,474.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,447.12 : 29,603.88 = 13,384.56 : x
  2. Step 2: Convert to fraction form
    21,447.12/29,603.88 = 13,384.56/x
  3. Step 3: Cross multiply
    21,447.12x = 29,603.88 × 13,384.56
  4. Step 4: Simplify right side
    21,447.12x = 396,234,908.09
  5. Step 5: Solve for x
    x = 396,234,908.09/21,447.12
  6. Step 6: Final answer
    x = 18,474.97

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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.