Home / 13,287.69-18,336.60-7,318.80

Finding the Fourth Proportional to 13,287.69, 18,336.60 and 7,318.80

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Solution

The fourth proportional to 13,287.69, 18,336.60 and 7,318.80 is: 10,099.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,287.69 : 18,336.60 = 7,318.80 : x
  2. Step 2: Convert to fraction form
    13,287.69/18,336.60 = 7,318.80/x
  3. Step 3: Cross multiply
    13,287.69x = 18,336.60 × 7,318.80
  4. Step 4: Simplify right side
    13,287.69x = 134,201,908.08
  5. Step 5: Solve for x
    x = 134,201,908.08/13,287.69
  6. Step 6: Final answer
    x = 10,099.72

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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.