Home / 20,685.87-31,033.98-6,647.13

Finding the Fourth Proportional to 20,685.87, 31,033.98 and 6,647.13

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Solution

The fourth proportional to 20,685.87, 31,033.98 and 6,647.13 is: 9,972.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,685.87 : 31,033.98 = 6,647.13 : x
  2. Step 2: Convert to fraction form
    20,685.87/31,033.98 = 6,647.13/x
  3. Step 3: Cross multiply
    20,685.87x = 31,033.98 × 6,647.13
  4. Step 4: Simplify right side
    20,685.87x = 206,286,899.48
  5. Step 5: Solve for x
    x = 206,286,899.48/20,685.87
  6. Step 6: Final answer
    x = 9,972.36

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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.