Home / 20,705.16-31,039.12-7,548.36

Finding the Fourth Proportional to 20,705.16, 31,039.12 and 7,548.36

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Solution

The fourth proportional to 20,705.16, 31,039.12 and 7,548.36 is: 11,315.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,705.16 : 31,039.12 = 7,548.36 : x
  2. Step 2: Convert to fraction form
    20,705.16/31,039.12 = 7,548.36/x
  3. Step 3: Cross multiply
    20,705.16x = 31,039.12 × 7,548.36
  4. Step 4: Simplify right side
    20,705.16x = 234,294,451.84
  5. Step 5: Solve for x
    x = 234,294,451.84/20,705.16
  6. Step 6: Final answer
    x = 11,315.75

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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.