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Finding the Fourth Proportional to 18,518.79, 27,780.92 and 5,369.46

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Solution

The fourth proportional to 18,518.79, 27,780.92 and 5,369.46 is: 8,054.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,518.79 : 27,780.92 = 5,369.46 : x
  2. Step 2: Convert to fraction form
    18,518.79/27,780.92 = 5,369.46/x
  3. Step 3: Cross multiply
    18,518.79x = 27,780.92 × 5,369.46
  4. Step 4: Simplify right side
    18,518.79x = 149,168,538.70
  5. Step 5: Solve for x
    x = 149,168,538.70/18,518.79
  6. Step 6: Final answer
    x = 8,054.98

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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.