Home / 20,785.98-31,191.26-7,647.57

Finding the Fourth Proportional to 20,785.98, 31,191.26 and 7,647.57

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Solution

The fourth proportional to 20,785.98, 31,191.26 and 7,647.57 is: 11,475.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,785.98 : 31,191.26 = 7,647.57 : x
  2. Step 2: Convert to fraction form
    20,785.98/31,191.26 = 7,647.57/x
  3. Step 3: Cross multiply
    20,785.98x = 31,191.26 × 7,647.57
  4. Step 4: Simplify right side
    20,785.98x = 238,537,150.04
  5. Step 5: Solve for x
    x = 238,537,150.04/20,785.98
  6. Step 6: Final answer
    x = 11,475.87

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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.