Home / 20,909.36-31,353.66-7,581.83

Finding the Fourth Proportional to 20,909.36, 31,353.66 and 7,581.83

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Solution

The fourth proportional to 20,909.36, 31,353.66 and 7,581.83 is: 11,368.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,909.36 : 31,353.66 = 7,581.83 : x
  2. Step 2: Convert to fraction form
    20,909.36/31,353.66 = 7,581.83/x
  3. Step 3: Cross multiply
    20,909.36x = 31,353.66 × 7,581.83
  4. Step 4: Simplify right side
    20,909.36x = 237,717,963.23
  5. Step 5: Solve for x
    x = 237,717,963.23/20,909.36
  6. Step 6: Final answer
    x = 11,368.97

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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.