Home / 20,973.81-31,431.04-11,618.11

Finding the Fourth Proportional to 20,973.81, 31,431.04 and 11,618.11

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Solution

The fourth proportional to 20,973.81, 31,431.04 and 11,618.11 is: 17,410.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,973.81 : 31,431.04 = 11,618.11 : x
  2. Step 2: Convert to fraction form
    20,973.81/31,431.04 = 11,618.11/x
  3. Step 3: Cross multiply
    20,973.81x = 31,431.04 × 11,618.11
  4. Step 4: Simplify right side
    20,973.81x = 365,169,280.13
  5. Step 5: Solve for x
    x = 365,169,280.13/20,973.81
  6. Step 6: Final answer
    x = 17,410.73

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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.