Home / 13,209.71-18,229.61-7,904.75

Finding the Fourth Proportional to 13,209.71, 18,229.61 and 7,904.75

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Solution

The fourth proportional to 13,209.71, 18,229.61 and 7,904.75 is: 10,908.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,209.71 : 18,229.61 = 7,904.75 : x
  2. Step 2: Convert to fraction form
    13,209.71/18,229.61 = 7,904.75/x
  3. Step 3: Cross multiply
    13,209.71x = 18,229.61 × 7,904.75
  4. Step 4: Simplify right side
    13,209.71x = 144,100,509.65
  5. Step 5: Solve for x
    x = 144,100,509.65/13,209.71
  6. Step 6: Final answer
    x = 10,908.68

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.