Home / 20,801.07-31,201.34-5,218.70

Finding the Fourth Proportional to 20,801.07, 31,201.34 and 5,218.70

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Solution

The fourth proportional to 20,801.07, 31,201.34 and 5,218.70 is: 7,827.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,801.07 : 31,201.34 = 5,218.70 : x
  2. Step 2: Convert to fraction form
    20,801.07/31,201.34 = 5,218.70/x
  3. Step 3: Cross multiply
    20,801.07x = 31,201.34 × 5,218.70
  4. Step 4: Simplify right side
    20,801.07x = 162,830,250.96
  5. Step 5: Solve for x
    x = 162,830,250.96/20,801.07
  6. Step 6: Final answer
    x = 7,827.97

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1.5x scale

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.