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Finding the Fourth Proportional to 39,896.76, 59,831.10 and 21,881.34

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Solution

The fourth proportional to 39,896.76, 59,831.10 and 21,881.34 is: 32,814.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,896.76 : 59,831.10 = 21,881.34 : x
  2. Step 2: Convert to fraction form
    39,896.76/59,831.10 = 21,881.34/x
  3. Step 3: Cross multiply
    39,896.76x = 59,831.10 × 21,881.34
  4. Step 4: Simplify right side
    39,896.76x = 1,309,184,641.67
  5. Step 5: Solve for x
    x = 1,309,184,641.67/39,896.76
  6. Step 6: Final answer
    x = 32,814.31

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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.