Home / 20,861.15-31,293.64-6,821.24

Finding the Fourth Proportional to 20,861.15, 31,293.64 and 6,821.24

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Solution

The fourth proportional to 20,861.15, 31,293.64 and 6,821.24 is: 10,232.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,861.15 : 31,293.64 = 6,821.24 : x
  2. Step 2: Convert to fraction form
    20,861.15/31,293.64 = 6,821.24/x
  3. Step 3: Cross multiply
    20,861.15x = 31,293.64 × 6,821.24
  4. Step 4: Simplify right side
    20,861.15x = 213,461,578.61
  5. Step 5: Solve for x
    x = 213,461,578.61/20,861.15
  6. Step 6: Final answer
    x = 10,232.50

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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.