Home / 39,894.47-55,054.73-21,990.11

Finding the Fourth Proportional to 39,894.47, 55,054.73 and 21,990.11

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Solution

The fourth proportional to 39,894.47, 55,054.73 and 21,990.11 is: 30,346.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,894.47 : 55,054.73 = 21,990.11 : x
  2. Step 2: Convert to fraction form
    39,894.47/55,054.73 = 21,990.11/x
  3. Step 3: Cross multiply
    39,894.47x = 55,054.73 × 21,990.11
  4. Step 4: Simplify right side
    39,894.47x = 1,210,659,905.77
  5. Step 5: Solve for x
    x = 1,210,659,905.77/39,894.47
  6. Step 6: Final answer
    x = 30,346.56

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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.