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Finding the Fourth Proportional to 40,986.70, 61,465.65 and 18,810.70

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Solution

The fourth proportional to 40,986.70, 61,465.65 and 18,810.70 is: 28,209.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,986.70 : 61,465.65 = 18,810.70 : x
  2. Step 2: Convert to fraction form
    40,986.70/61,465.65 = 18,810.70/x
  3. Step 3: Cross multiply
    40,986.70x = 61,465.65 × 18,810.70
  4. Step 4: Simplify right side
    40,986.70x = 1,156,211,902.46
  5. Step 5: Solve for x
    x = 1,156,211,902.46/40,986.70
  6. Step 6: Final answer
    x = 28,209.44

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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.