Home / 21,366.46-31,987.41-12,454.53

Finding the Fourth Proportional to 21,366.46, 31,987.41 and 12,454.53

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Solution

The fourth proportional to 21,366.46, 31,987.41 and 12,454.53 is: 18,645.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,366.46 : 31,987.41 = 12,454.53 : x
  2. Step 2: Convert to fraction form
    21,366.46/31,987.41 = 12,454.53/x
  3. Step 3: Cross multiply
    21,366.46x = 31,987.41 × 12,454.53
  4. Step 4: Simplify right side
    21,366.46x = 398,388,030.79
  5. Step 5: Solve for x
    x = 398,388,030.79/21,366.46
  6. Step 6: Final answer
    x = 18,645.48

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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.