Home / 21,012.28-31,507.48-6,219.21

Finding the Fourth Proportional to 21,012.28, 31,507.48 and 6,219.21

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Solution

The fourth proportional to 21,012.28, 31,507.48 and 6,219.21 is: 9,325.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,012.28 : 31,507.48 = 6,219.21 : x
  2. Step 2: Convert to fraction form
    21,012.28/31,507.48 = 6,219.21/x
  3. Step 3: Cross multiply
    21,012.28x = 31,507.48 × 6,219.21
  4. Step 4: Simplify right side
    21,012.28x = 195,951,760.62
  5. Step 5: Solve for x
    x = 195,951,760.62/21,012.28
  6. Step 6: Final answer
    x = 9,325.58

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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.