Home / 20,919.48-31,376.43-7,770.06

Finding the Fourth Proportional to 20,919.48, 31,376.43 and 7,770.06

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Solution

The fourth proportional to 20,919.48, 31,376.43 and 7,770.06 is: 11,654.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,919.48 : 31,376.43 = 7,770.06 : x
  2. Step 2: Convert to fraction form
    20,919.48/31,376.43 = 7,770.06/x
  3. Step 3: Cross multiply
    20,919.48x = 31,376.43 × 7,770.06
  4. Step 4: Simplify right side
    20,919.48x = 243,796,743.69
  5. Step 5: Solve for x
    x = 243,796,743.69/20,919.48
  6. Step 6: Final answer
    x = 11,654.05

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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.