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Finding the Fourth Proportional to 13,726.68, 18,941.22 and 8,061.54

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Solution

The fourth proportional to 13,726.68, 18,941.22 and 8,061.54 is: 11,123.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,726.68 : 18,941.22 = 8,061.54 : x
  2. Step 2: Convert to fraction form
    13,726.68/18,941.22 = 8,061.54/x
  3. Step 3: Cross multiply
    13,726.68x = 18,941.22 × 8,061.54
  4. Step 4: Simplify right side
    13,726.68x = 152,695,402.68
  5. Step 5: Solve for x
    x = 152,695,402.68/13,726.68
  6. Step 6: Final answer
    x = 11,123.99

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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.