Home / 20,705.12-31,064.16-7,561.52

Finding the Fourth Proportional to 20,705.12, 31,064.16 and 7,561.52

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Solution

The fourth proportional to 20,705.12, 31,064.16 and 7,561.52 is: 11,344.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,705.12 : 31,064.16 = 7,561.52 : x
  2. Step 2: Convert to fraction form
    20,705.12/31,064.16 = 7,561.52/x
  3. Step 3: Cross multiply
    20,705.12x = 31,064.16 × 7,561.52
  4. Step 4: Simplify right side
    20,705.12x = 234,892,267.12
  5. Step 5: Solve for x
    x = 234,892,267.12/20,705.12
  6. Step 6: Final answer
    x = 11,344.65

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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.