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Finding the Fourth Proportional to 43,154.52, 64,731.76 and 11,989.76

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Solution

The fourth proportional to 43,154.52, 64,731.76 and 11,989.76 is: 17,984.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,154.52 : 64,731.76 = 11,989.76 : x
  2. Step 2: Convert to fraction form
    43,154.52/64,731.76 = 11,989.76/x
  3. Step 3: Cross multiply
    43,154.52x = 64,731.76 × 11,989.76
  4. Step 4: Simplify right side
    43,154.52x = 776,118,266.78
  5. Step 5: Solve for x
    x = 776,118,266.78/43,154.52
  6. Step 6: Final answer
    x = 17,984.63

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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.