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Finding the Fourth Proportional to 42,913, 64,396.38 and 18,289

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Solution

The fourth proportional to 42,913, 64,396.38 and 18,289 is: 27,444.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,913 : 64,396.38 = 18,289 : x
  2. Step 2: Convert to fraction form
    42,913/64,396.38 = 18,289/x
  3. Step 3: Cross multiply
    42,913x = 64,396.38 × 18,289
  4. Step 4: Simplify right side
    42,913x = 1,177,745,393.82
  5. Step 5: Solve for x
    x = 1,177,745,393.82/42,913
  6. Step 6: Final answer
    x = 27,444.96

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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.