Home / 21,904.74-30,230.91-13,412.58

Finding the Fourth Proportional to 21,904.74, 30,230.91 and 13,412.58

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Solution

The fourth proportional to 21,904.74, 30,230.91 and 13,412.58 is: 18,510.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,904.74 : 30,230.91 = 13,412.58 : x
  2. Step 2: Convert to fraction form
    21,904.74/30,230.91 = 13,412.58/x
  3. Step 3: Cross multiply
    21,904.74x = 30,230.91 × 13,412.58
  4. Step 4: Simplify right side
    21,904.74x = 405,474,498.85
  5. Step 5: Solve for x
    x = 405,474,498.85/21,904.74
  6. Step 6: Final answer
    x = 18,510.81

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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.