Home / 20,688.72-31,026.60-10,822.80

Finding the Fourth Proportional to 20,688.72, 31,026.60 and 10,822.80

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Solution

The fourth proportional to 20,688.72, 31,026.60 and 10,822.80 is: 16,230.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,688.72 : 31,026.60 = 10,822.80 : x
  2. Step 2: Convert to fraction form
    20,688.72/31,026.60 = 10,822.80/x
  3. Step 3: Cross multiply
    20,688.72x = 31,026.60 × 10,822.80
  4. Step 4: Simplify right side
    20,688.72x = 335,794,686.48
  5. Step 5: Solve for x
    x = 335,794,686.48/20,688.72
  6. Step 6: Final answer
    x = 16,230.81

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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.