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Finding the Fourth Proportional to 43,216.65, 64,824.98 and 13,636.76

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Solution

The fourth proportional to 43,216.65, 64,824.98 and 13,636.76 is: 20,455.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,216.65 : 64,824.98 = 13,636.76 : x
  2. Step 2: Convert to fraction form
    43,216.65/64,824.98 = 13,636.76/x
  3. Step 3: Cross multiply
    43,216.65x = 64,824.98 × 13,636.76
  4. Step 4: Simplify right side
    43,216.65x = 884,002,301.96
  5. Step 5: Solve for x
    x = 884,002,301.96/43,216.65
  6. Step 6: Final answer
    x = 20,455.13

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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.