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Finding the Fourth Proportional to 12,726.20, 19,068.42 and 12,240.20

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Solution

The fourth proportional to 12,726.20, 19,068.42 and 12,240.20 is: 18,340.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,726.20 : 19,068.42 = 12,240.20 : x
  2. Step 2: Convert to fraction form
    12,726.20/19,068.42 = 12,240.20/x
  3. Step 3: Cross multiply
    12,726.20x = 19,068.42 × 12,240.20
  4. Step 4: Simplify right side
    12,726.20x = 233,401,274.48
  5. Step 5: Solve for x
    x = 233,401,274.48/12,726.20
  6. Step 6: Final answer
    x = 18,340.22

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1.5x scale

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.