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Finding the Fourth Proportional to 26,931.19, 40,390.29 and 11,930.01

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Solution

The fourth proportional to 26,931.19, 40,390.29 and 11,930.01 is: 17,892.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,931.19 : 40,390.29 = 11,930.01 : x
  2. Step 2: Convert to fraction form
    26,931.19/40,390.29 = 11,930.01/x
  3. Step 3: Cross multiply
    26,931.19x = 40,390.29 × 11,930.01
  4. Step 4: Simplify right side
    26,931.19x = 481,856,775.10
  5. Step 5: Solve for x
    x = 481,856,775.10/26,931.19
  6. Step 6: Final answer
    x = 17,892.15

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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.