Home / 21,726.36-29,981.88-12,771.90

Finding the Fourth Proportional to 21,726.36, 29,981.88 and 12,771.90

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Solution

The fourth proportional to 21,726.36, 29,981.88 and 12,771.90 is: 17,624.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,726.36 : 29,981.88 = 12,771.90 : x
  2. Step 2: Convert to fraction form
    21,726.36/29,981.88 = 12,771.90/x
  3. Step 3: Cross multiply
    21,726.36x = 29,981.88 × 12,771.90
  4. Step 4: Simplify right side
    21,726.36x = 382,925,573.17
  5. Step 5: Solve for x
    x = 382,925,573.17/21,726.36
  6. Step 6: Final answer
    x = 17,624.93

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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.