Home / 20,989.92-31,482.96-6,397.92

Finding the Fourth Proportional to 20,989.92, 31,482.96 and 6,397.92

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Solution

The fourth proportional to 20,989.92, 31,482.96 and 6,397.92 is: 9,596.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,989.92 : 31,482.96 = 6,397.92 : x
  2. Step 2: Convert to fraction form
    20,989.92/31,482.96 = 6,397.92/x
  3. Step 3: Cross multiply
    20,989.92x = 31,482.96 × 6,397.92
  4. Step 4: Simplify right side
    20,989.92x = 201,425,459.44
  5. Step 5: Solve for x
    x = 201,425,459.44/20,989.92
  6. Step 6: Final answer
    x = 9,596.29

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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.