Home / 20,765.32-31,160.43-7,619.02

Finding the Fourth Proportional to 20,765.32, 31,160.43 and 7,619.02

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Solution

The fourth proportional to 20,765.32, 31,160.43 and 7,619.02 is: 11,433.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,765.32 : 31,160.43 = 7,619.02 : x
  2. Step 2: Convert to fraction form
    20,765.32/31,160.43 = 7,619.02/x
  3. Step 3: Cross multiply
    20,765.32x = 31,160.43 × 7,619.02
  4. Step 4: Simplify right side
    20,765.32x = 237,411,939.38
  5. Step 5: Solve for x
    x = 237,411,939.38/20,765.32
  6. Step 6: Final answer
    x = 11,433.10

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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.