Home / 13,857.28-20,778.61-9,475.99

Finding the Fourth Proportional to 13,857.28, 20,778.61 and 9,475.99

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Solution

The fourth proportional to 13,857.28, 20,778.61 and 9,475.99 is: 14,208.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,857.28 : 20,778.61 = 9,475.99 : x
  2. Step 2: Convert to fraction form
    13,857.28/20,778.61 = 9,475.99/x
  3. Step 3: Cross multiply
    13,857.28x = 20,778.61 × 9,475.99
  4. Step 4: Simplify right side
    13,857.28x = 196,897,900.57
  5. Step 5: Solve for x
    x = 196,897,900.57/13,857.28
  6. Step 6: Final answer
    x = 14,208.99

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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.