Home / 21,726.76-29,976.06-12,771.40

Finding the Fourth Proportional to 21,726.76, 29,976.06 and 12,771.40

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Solution

The fourth proportional to 21,726.76, 29,976.06 and 12,771.40 is: 17,620.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,726.76 : 29,976.06 = 12,771.40 : x
  2. Step 2: Convert to fraction form
    21,726.76/29,976.06 = 12,771.40/x
  3. Step 3: Cross multiply
    21,726.76x = 29,976.06 × 12,771.40
  4. Step 4: Simplify right side
    21,726.76x = 382,836,252.68
  5. Step 5: Solve for x
    x = 382,836,252.68/21,726.76
  6. Step 6: Final answer
    x = 17,620.49

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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.