Home / 20,690.08-31,037.18-7,539.38

Finding the Fourth Proportional to 20,690.08, 31,037.18 and 7,539.38

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Solution

The fourth proportional to 20,690.08, 31,037.18 and 7,539.38 is: 11,309.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,690.08 : 31,037.18 = 7,539.38 : x
  2. Step 2: Convert to fraction form
    20,690.08/31,037.18 = 7,539.38/x
  3. Step 3: Cross multiply
    20,690.08x = 31,037.18 × 7,539.38
  4. Step 4: Simplify right side
    20,690.08x = 234,001,017.66
  5. Step 5: Solve for x
    x = 234,001,017.66/20,690.08
  6. Step 6: Final answer
    x = 11,309.82

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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.