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Finding the Fourth Proportional to 18,810.94, 28,161.03 and 13,902.46

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Solution

The fourth proportional to 18,810.94, 28,161.03 and 13,902.46 is: 20,812.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,810.94 : 28,161.03 = 13,902.46 : x
  2. Step 2: Convert to fraction form
    18,810.94/28,161.03 = 13,902.46/x
  3. Step 3: Cross multiply
    18,810.94x = 28,161.03 × 13,902.46
  4. Step 4: Simplify right side
    18,810.94x = 391,507,593.13
  5. Step 5: Solve for x
    x = 391,507,593.13/18,810.94
  6. Step 6: Final answer
    x = 20,812.76

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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.