Home / 20,785.48-31,190.51-7,647.07

Finding the Fourth Proportional to 20,785.48, 31,190.51 and 7,647.07

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Solution

The fourth proportional to 20,785.48, 31,190.51 and 7,647.07 is: 11,475.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,785.48 : 31,190.51 = 7,647.07 : x
  2. Step 2: Convert to fraction form
    20,785.48/31,190.51 = 7,647.07/x
  3. Step 3: Cross multiply
    20,785.48x = 31,190.51 × 7,647.07
  4. Step 4: Simplify right side
    20,785.48x = 238,515,819.12
  5. Step 5: Solve for x
    x = 238,515,819.12/20,785.48
  6. Step 6: Final answer
    x = 11,475.12

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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.