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Finding the Fourth Proportional to 18,475.20, 27,730.20 and 9,716.40

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Solution

The fourth proportional to 18,475.20, 27,730.20 and 9,716.40 is: 14,583.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,475.20 : 27,730.20 = 9,716.40 : x
  2. Step 2: Convert to fraction form
    18,475.20/27,730.20 = 9,716.40/x
  3. Step 3: Cross multiply
    18,475.20x = 27,730.20 × 9,716.40
  4. Step 4: Simplify right side
    18,475.20x = 269,437,715.28
  5. Step 5: Solve for x
    x = 269,437,715.28/18,475.20
  6. Step 6: Final answer
    x = 14,583.75

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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.