Home / 20,753.72-31,139.73-10,890.62

Finding the Fourth Proportional to 20,753.72, 31,139.73 and 10,890.62

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Solution

The fourth proportional to 20,753.72, 31,139.73 and 10,890.62 is: 16,340.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,753.72 : 31,139.73 = 10,890.62 : x
  2. Step 2: Convert to fraction form
    20,753.72/31,139.73 = 10,890.62/x
  3. Step 3: Cross multiply
    20,753.72x = 31,139.73 × 10,890.62
  4. Step 4: Simplify right side
    20,753.72x = 339,130,966.33
  5. Step 5: Solve for x
    x = 339,130,966.33/20,753.72
  6. Step 6: Final answer
    x = 16,340.73

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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.