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Finding the Fourth Proportional to 16,931.40, 25,418.70 and 9,040.20

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Solution

The fourth proportional to 16,931.40, 25,418.70 and 9,040.20 is: 13,571.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,931.40 : 25,418.70 = 9,040.20 : x
  2. Step 2: Convert to fraction form
    16,931.40/25,418.70 = 9,040.20/x
  3. Step 3: Cross multiply
    16,931.40x = 25,418.70 × 9,040.20
  4. Step 4: Simplify right side
    16,931.40x = 229,790,131.74
  5. Step 5: Solve for x
    x = 229,790,131.74/16,931.40
  6. Step 6: Final answer
    x = 13,571.83

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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.