Home / 42,911.55-64,343.97-12,921.39

Finding the Fourth Proportional to 42,911.55, 64,343.97 and 12,921.39

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Solution

The fourth proportional to 42,911.55, 64,343.97 and 12,921.39 is: 19,375.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,911.55 : 64,343.97 = 12,921.39 : x
  2. Step 2: Convert to fraction form
    42,911.55/64,343.97 = 12,921.39/x
  3. Step 3: Cross multiply
    42,911.55x = 64,343.97 × 12,921.39
  4. Step 4: Simplify right side
    42,911.55x = 831,413,530.52
  5. Step 5: Solve for x
    x = 831,413,530.52/42,911.55
  6. Step 6: Final answer
    x = 19,375.05

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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.