Home / 42,276.78-63,365.76-21,205.44

Finding the Fourth Proportional to 42,276.78, 63,365.76 and 21,205.44

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Solution

The fourth proportional to 42,276.78, 63,365.76 and 21,205.44 is: 31,783.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,276.78 : 63,365.76 = 21,205.44 : x
  2. Step 2: Convert to fraction form
    42,276.78/63,365.76 = 21,205.44/x
  3. Step 3: Cross multiply
    42,276.78x = 63,365.76 × 21,205.44
  4. Step 4: Simplify right side
    42,276.78x = 1,343,698,821.73
  5. Step 5: Solve for x
    x = 1,343,698,821.73/42,276.78
  6. Step 6: Final answer
    x = 31,783.38

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.