Home / 18,868.50-26,031.89-11,317.28

Finding the Fourth Proportional to 18,868.50, 26,031.89 and 11,317.28

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Solution

The fourth proportional to 18,868.50, 26,031.89 and 11,317.28 is: 15,613.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,868.50 : 26,031.89 = 11,317.28 : x
  2. Step 2: Convert to fraction form
    18,868.50/26,031.89 = 11,317.28/x
  3. Step 3: Cross multiply
    18,868.50x = 26,031.89 × 11,317.28
  4. Step 4: Simplify right side
    18,868.50x = 294,610,086.19
  5. Step 5: Solve for x
    x = 294,610,086.19/18,868.50
  6. Step 6: Final answer
    x = 15,613.86

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.