Home / 20,832.31-31,251.70-6,978.07

Finding the Fourth Proportional to 20,832.31, 31,251.70 and 6,978.07

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Solution

The fourth proportional to 20,832.31, 31,251.70 and 6,978.07 is: 10,468.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,832.31 : 31,251.70 = 6,978.07 : x
  2. Step 2: Convert to fraction form
    20,832.31/31,251.70 = 6,978.07/x
  3. Step 3: Cross multiply
    20,832.31x = 31,251.70 × 6,978.07
  4. Step 4: Simplify right side
    20,832.31x = 218,076,359.07
  5. Step 5: Solve for x
    x = 218,076,359.07/20,832.31
  6. Step 6: Final answer
    x = 10,468.18

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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.