Home / 21,351.41-29,478.66-13,809.30

Finding the Fourth Proportional to 21,351.41, 29,478.66 and 13,809.30

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Solution

The fourth proportional to 21,351.41, 29,478.66 and 13,809.30 is: 19,065.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,351.41 : 29,478.66 = 13,809.30 : x
  2. Step 2: Convert to fraction form
    21,351.41/29,478.66 = 13,809.30/x
  3. Step 3: Cross multiply
    21,351.41x = 29,478.66 × 13,809.30
  4. Step 4: Simplify right side
    21,351.41x = 407,079,659.54
  5. Step 5: Solve for x
    x = 407,079,659.54/21,351.41
  6. Step 6: Final answer
    x = 19,065.71

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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.