Home / 20,842.78-31,264.22-5,260.40

Finding the Fourth Proportional to 20,842.78, 31,264.22 and 5,260.40

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Solution

The fourth proportional to 20,842.78, 31,264.22 and 5,260.40 is: 7,890.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,842.78 : 31,264.22 = 5,260.40 : x
  2. Step 2: Convert to fraction form
    20,842.78/31,264.22 = 5,260.40/x
  3. Step 3: Cross multiply
    20,842.78x = 31,264.22 × 5,260.40
  4. Step 4: Simplify right side
    20,842.78x = 164,462,302.89
  5. Step 5: Solve for x
    x = 164,462,302.89/20,842.78
  6. Step 6: Final answer
    x = 7,890.61

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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.