Home / 20,792.10-31,188.12-5,209.74

Finding the Fourth Proportional to 20,792.10, 31,188.12 and 5,209.74

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Solution

The fourth proportional to 20,792.10, 31,188.12 and 5,209.74 is: 7,814.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,792.10 : 31,188.12 = 5,209.74 : x
  2. Step 2: Convert to fraction form
    20,792.10/31,188.12 = 5,209.74/x
  3. Step 3: Cross multiply
    20,792.10x = 31,188.12 × 5,209.74
  4. Step 4: Simplify right side
    20,792.10x = 162,481,996.29
  5. Step 5: Solve for x
    x = 162,481,996.29/20,792.10
  6. Step 6: Final answer
    x = 7,814.60

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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.