Home / 20,705.28-31,045.46-9,305.12

Finding the Fourth Proportional to 20,705.28, 31,045.46 and 9,305.12

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Solution

The fourth proportional to 20,705.28, 31,045.46 and 9,305.12 is: 13,952.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,705.28 : 31,045.46 = 9,305.12 : x
  2. Step 2: Convert to fraction form
    20,705.28/31,045.46 = 9,305.12/x
  3. Step 3: Cross multiply
    20,705.28x = 31,045.46 × 9,305.12
  4. Step 4: Simplify right side
    20,705.28x = 288,881,529.00
  5. Step 5: Solve for x
    x = 288,881,529.00/20,705.28
  6. Step 6: Final answer
    x = 13,952.07

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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.