Home / 40,140.49-55,393.88-21,991.29

Finding the Fourth Proportional to 40,140.49, 55,393.88 and 21,991.29

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Solution

The fourth proportional to 40,140.49, 55,393.88 and 21,991.29 is: 30,347.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,140.49 : 55,393.88 = 21,991.29 : x
  2. Step 2: Convert to fraction form
    40,140.49/55,393.88 = 21,991.29/x
  3. Step 3: Cross multiply
    40,140.49x = 55,393.88 × 21,991.29
  4. Step 4: Simplify right side
    40,140.49x = 1,218,182,831.20
  5. Step 5: Solve for x
    x = 1,218,182,831.20/40,140.49
  6. Step 6: Final answer
    x = 30,347.98

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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.