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Finding the Fourth Proportional to 43,291.64, 64,943.04 and 15,209.68

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Solution

The fourth proportional to 43,291.64, 64,943.04 and 15,209.68 is: 22,816.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,291.64 : 64,943.04 = 15,209.68 : x
  2. Step 2: Convert to fraction form
    43,291.64/64,943.04 = 15,209.68/x
  3. Step 3: Cross multiply
    43,291.64x = 64,943.04 × 15,209.68
  4. Step 4: Simplify right side
    43,291.64x = 987,762,856.63
  5. Step 5: Solve for x
    x = 987,762,856.63/43,291.64
  6. Step 6: Final answer
    x = 22,816.48

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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.