Home / 20,818.15-31,231.41-7,670.59

Finding the Fourth Proportional to 20,818.15, 31,231.41 and 7,670.59

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Solution

The fourth proportional to 20,818.15, 31,231.41 and 7,670.59 is: 11,507.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,818.15 : 31,231.41 = 7,670.59 : x
  2. Step 2: Convert to fraction form
    20,818.15/31,231.41 = 7,670.59/x
  3. Step 3: Cross multiply
    20,818.15x = 31,231.41 × 7,670.59
  4. Step 4: Simplify right side
    20,818.15x = 239,563,341.23
  5. Step 5: Solve for x
    x = 239,563,341.23/20,818.15
  6. Step 6: Final answer
    x = 11,507.43

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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.