Home / 21,726.20-29,984.10-12,769.22

Finding the Fourth Proportional to 21,726.20, 29,984.10 and 12,769.22

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Solution

The fourth proportional to 21,726.20, 29,984.10 and 12,769.22 is: 17,622.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,726.20 : 29,984.10 = 12,769.22 : x
  2. Step 2: Convert to fraction form
    21,726.20/29,984.10 = 12,769.22/x
  3. Step 3: Cross multiply
    21,726.20x = 29,984.10 × 12,769.22
  4. Step 4: Simplify right side
    21,726.20x = 382,873,569.40
  5. Step 5: Solve for x
    x = 382,873,569.40/21,726.20
  6. Step 6: Final answer
    x = 17,622.67

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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.