Home / 40,388.66-55,618.76-31,421.06

Finding the Fourth Proportional to 40,388.66, 55,618.76 and 31,421.06

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Solution

The fourth proportional to 40,388.66, 55,618.76 and 31,421.06 is: 43,269.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,388.66 : 55,618.76 = 31,421.06 : x
  2. Step 2: Convert to fraction form
    40,388.66/55,618.76 = 31,421.06/x
  3. Step 3: Cross multiply
    40,388.66x = 55,618.76 × 31,421.06
  4. Step 4: Simplify right side
    40,388.66x = 1,747,600,395.09
  5. Step 5: Solve for x
    x = 1,747,600,395.09/40,388.66
  6. Step 6: Final answer
    x = 43,269.58

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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.