Home / 40,078.86-55,307.48-21,929.50

Finding the Fourth Proportional to 40,078.86, 55,307.48 and 21,929.50

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Solution

The fourth proportional to 40,078.86, 55,307.48 and 21,929.50 is: 30,261.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,078.86 : 55,307.48 = 21,929.50 : x
  2. Step 2: Convert to fraction form
    40,078.86/55,307.48 = 21,929.50/x
  3. Step 3: Cross multiply
    40,078.86x = 55,307.48 × 21,929.50
  4. Step 4: Simplify right side
    40,078.86x = 1,212,865,382.66
  5. Step 5: Solve for x
    x = 1,212,865,382.66/40,078.86
  6. Step 6: Final answer
    x = 30,261.97

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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.