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Finding the Fourth Proportional to 43,806.90, 65,703.16 and 12,219.11

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Solution

The fourth proportional to 43,806.90, 65,703.16 and 12,219.11 is: 18,326.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,806.90 : 65,703.16 = 12,219.11 : x
  2. Step 2: Convert to fraction form
    43,806.90/65,703.16 = 12,219.11/x
  3. Step 3: Cross multiply
    43,806.90x = 65,703.16 × 12,219.11
  4. Step 4: Simplify right side
    43,806.90x = 802,834,139.39
  5. Step 5: Solve for x
    x = 802,834,139.39/43,806.90
  6. Step 6: Final answer
    x = 18,326.66

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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.