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Finding the Fourth Proportional to 43,018, 64,529.43 and 15,316

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Solution

The fourth proportional to 43,018, 64,529.43 and 15,316 is: 22,974.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,018 : 64,529.43 = 15,316 : x
  2. Step 2: Convert to fraction form
    43,018/64,529.43 = 15,316/x
  3. Step 3: Cross multiply
    43,018x = 64,529.43 × 15,316
  4. Step 4: Simplify right side
    43,018x = 988,332,749.88
  5. Step 5: Solve for x
    x = 988,332,749.88/43,018
  6. Step 6: Final answer
    x = 22,974.87

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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.