Home / 39,881.76-55,036.52-21,976.36

Finding the Fourth Proportional to 39,881.76, 55,036.52 and 21,976.36

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Solution

The fourth proportional to 39,881.76, 55,036.52 and 21,976.36 is: 30,327.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,881.76 : 55,036.52 = 21,976.36 : x
  2. Step 2: Convert to fraction form
    39,881.76/55,036.52 = 21,976.36/x
  3. Step 3: Cross multiply
    39,881.76x = 55,036.52 × 21,976.36
  4. Step 4: Simplify right side
    39,881.76x = 1,209,502,376.67
  5. Step 5: Solve for x
    x = 1,209,502,376.67/39,881.76
  6. Step 6: Final answer
    x = 30,327.21

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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.