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Finding the Fourth Proportional to 40,984.70, 61,462.65 and 18,808.70

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Solution

The fourth proportional to 40,984.70, 61,462.65 and 18,808.70 is: 28,206.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,984.70 : 61,462.65 = 18,808.70 : x
  2. Step 2: Convert to fraction form
    40,984.70/61,462.65 = 18,808.70/x
  3. Step 3: Cross multiply
    40,984.70x = 61,462.65 × 18,808.70
  4. Step 4: Simplify right side
    40,984.70x = 1,156,032,545.06
  5. Step 5: Solve for x
    x = 1,156,032,545.06/40,984.70
  6. Step 6: Final answer
    x = 28,206.44

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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.