Home / 20,854.77-31,285.62-6,810.72

Finding the Fourth Proportional to 20,854.77, 31,285.62 and 6,810.72

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Solution

The fourth proportional to 20,854.77, 31,285.62 and 6,810.72 is: 10,217.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,854.77 : 31,285.62 = 6,810.72 : x
  2. Step 2: Convert to fraction form
    20,854.77/31,285.62 = 6,810.72/x
  3. Step 3: Cross multiply
    20,854.77x = 31,285.62 × 6,810.72
  4. Step 4: Simplify right side
    20,854.77x = 213,077,597.85
  5. Step 5: Solve for x
    x = 213,077,597.85/20,854.77
  6. Step 6: Final answer
    x = 10,217.21

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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.