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Finding the Fourth Proportional to 13,908.68, 20,738.96 and 12,363.20

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Solution

The fourth proportional to 13,908.68, 20,738.96 and 12,363.20 is: 18,434.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,908.68 : 20,738.96 = 12,363.20 : x
  2. Step 2: Convert to fraction form
    13,908.68/20,738.96 = 12,363.20/x
  3. Step 3: Cross multiply
    13,908.68x = 20,738.96 × 12,363.20
  4. Step 4: Simplify right side
    13,908.68x = 256,399,848.46
  5. Step 5: Solve for x
    x = 256,399,848.46/13,908.68
  6. Step 6: Final answer
    x = 18,434.52

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.