Home / 18,715.65-28,059.44-11,318.60

Finding the Fourth Proportional to 18,715.65, 28,059.44 and 11,318.60

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Solution

The fourth proportional to 18,715.65, 28,059.44 and 11,318.60 is: 16,969.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,715.65 : 28,059.44 = 11,318.60 : x
  2. Step 2: Convert to fraction form
    18,715.65/28,059.44 = 11,318.60/x
  3. Step 3: Cross multiply
    18,715.65x = 28,059.44 × 11,318.60
  4. Step 4: Simplify right side
    18,715.65x = 317,593,380.69
  5. Step 5: Solve for x
    x = 317,593,380.69/18,715.65
  6. Step 6: Final answer
    x = 16,969.40

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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.