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Finding the Fourth Proportional to 19,902.80, 27,463.56 and 13,624.40

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Solution

The fourth proportional to 19,902.80, 27,463.56 and 13,624.40 is: 18,800.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,902.80 : 27,463.56 = 13,624.40 : x
  2. Step 2: Convert to fraction form
    19,902.80/27,463.56 = 13,624.40/x
  3. Step 3: Cross multiply
    19,902.80x = 27,463.56 × 13,624.40
  4. Step 4: Simplify right side
    19,902.80x = 374,174,526.86
  5. Step 5: Solve for x
    x = 374,174,526.86/19,902.80
  6. Step 6: Final answer
    x = 18,800.09

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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.