Home / 20,904.55-31,340.72-18,127.40

Finding the Fourth Proportional to 20,904.55, 31,340.72 and 18,127.40

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Solution

The fourth proportional to 20,904.55, 31,340.72 and 18,127.40 is: 27,177.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,904.55 : 31,340.72 = 18,127.40 : x
  2. Step 2: Convert to fraction form
    20,904.55/31,340.72 = 18,127.40/x
  3. Step 3: Cross multiply
    20,904.55x = 31,340.72 × 18,127.40
  4. Step 4: Simplify right side
    20,904.55x = 568,125,656.34
  5. Step 5: Solve for x
    x = 568,125,656.34/20,904.55
  6. Step 6: Final answer
    x = 27,177.13

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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.