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Finding the Fourth Proportional to 8,709.40, 12,018 and 4,932

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Solution

The fourth proportional to 8,709.40, 12,018 and 4,932 is: 6,805.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,709.40 : 12,018 = 4,932 : x
  2. Step 2: Convert to fraction form
    8,709.40/12,018 = 4,932/x
  3. Step 3: Cross multiply
    8,709.40x = 12,018 × 4,932
  4. Step 4: Simplify right side
    8,709.40x = 59,272,776
  5. Step 5: Solve for x
    x = 59,272,776/8,709.40
  6. Step 6: Final answer
    x = 6,805.61

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.