Home / 26,919.81-40,387.98-13,781.40

Finding the Fourth Proportional to 26,919.81, 40,387.98 and 13,781.40

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Solution

The fourth proportional to 26,919.81, 40,387.98 and 13,781.40 is: 20,676.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,919.81 : 40,387.98 = 13,781.40 : x
  2. Step 2: Convert to fraction form
    26,919.81/40,387.98 = 13,781.40/x
  3. Step 3: Cross multiply
    26,919.81x = 40,387.98 × 13,781.40
  4. Step 4: Simplify right side
    26,919.81x = 556,602,907.57
  5. Step 5: Solve for x
    x = 556,602,907.57/26,919.81
  6. Step 6: Final answer
    x = 20,676.34

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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.