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Finding the Fourth Proportional to 43,290.65, 64,942.80 and 18,330.83

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Solution

The fourth proportional to 43,290.65, 64,942.80 and 18,330.83 is: 27,499.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,290.65 : 64,942.80 = 18,330.83 : x
  2. Step 2: Convert to fraction form
    43,290.65/64,942.80 = 18,330.83/x
  3. Step 3: Cross multiply
    43,290.65x = 64,942.80 × 18,330.83
  4. Step 4: Simplify right side
    43,290.65x = 1,190,455,426.52
  5. Step 5: Solve for x
    x = 1,190,455,426.52/43,290.65
  6. Step 6: Final answer
    x = 27,499.13

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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.