Home / 26,207.81-39,278.90-20,639.17

Finding the Fourth Proportional to 26,207.81, 39,278.90 and 20,639.17

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Solution

The fourth proportional to 26,207.81, 39,278.90 and 20,639.17 is: 30,932.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,207.81 : 39,278.90 = 20,639.17 : x
  2. Step 2: Convert to fraction form
    26,207.81/39,278.90 = 20,639.17/x
  3. Step 3: Cross multiply
    26,207.81x = 39,278.90 × 20,639.17
  4. Step 4: Simplify right side
    26,207.81x = 810,683,698.12
  5. Step 5: Solve for x
    x = 810,683,698.12/26,207.81
  6. Step 6: Final answer
    x = 30,932.91

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1.5x scale

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.