Home / 40,079.80-55,308.10-21,930.13

Finding the Fourth Proportional to 40,079.80, 55,308.10 and 21,930.13

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Solution

The fourth proportional to 40,079.80, 55,308.10 and 21,930.13 is: 30,262.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,079.80 : 55,308.10 = 21,930.13 : x
  2. Step 2: Convert to fraction form
    40,079.80/55,308.10 = 21,930.13/x
  3. Step 3: Cross multiply
    40,079.80x = 55,308.10 × 21,930.13
  4. Step 4: Simplify right side
    40,079.80x = 1,212,913,837.36
  5. Step 5: Solve for x
    x = 1,212,913,837.36/40,079.80
  6. Step 6: Final answer
    x = 30,262.47

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1.5x scale

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.