Home / 20,690.79-31,036.19-7,543.14

Finding the Fourth Proportional to 20,690.79, 31,036.19 and 7,543.14

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Solution

The fourth proportional to 20,690.79, 31,036.19 and 7,543.14 is: 11,314.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,690.79 : 31,036.19 = 7,543.14 : x
  2. Step 2: Convert to fraction form
    20,690.79/31,036.19 = 7,543.14/x
  3. Step 3: Cross multiply
    20,690.79x = 31,036.19 × 7,543.14
  4. Step 4: Simplify right side
    20,690.79x = 234,110,288.52
  5. Step 5: Solve for x
    x = 234,110,288.52/20,690.79
  6. Step 6: Final answer
    x = 11,314.71

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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.