Home / 39,000.78-53,821.08-21,095.82

Finding the Fourth Proportional to 39,000.78, 53,821.08 and 21,095.82

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Solution

The fourth proportional to 39,000.78, 53,821.08 and 21,095.82 is: 29,112.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,000.78 : 53,821.08 = 21,095.82 : x
  2. Step 2: Convert to fraction form
    39,000.78/53,821.08 = 21,095.82/x
  3. Step 3: Cross multiply
    39,000.78x = 53,821.08 × 21,095.82
  4. Step 4: Simplify right side
    39,000.78x = 1,135,399,815.89
  5. Step 5: Solve for x
    x = 1,135,399,815.89/39,000.78
  6. Step 6: Final answer
    x = 29,112.23

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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.