Home / 13,287.02-18,336.10-7,318.70

Finding the Fourth Proportional to 13,287.02, 18,336.10 and 7,318.70

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Solution

The fourth proportional to 13,287.02, 18,336.10 and 7,318.70 is: 10,099.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,287.02 : 18,336.10 = 7,318.70 : x
  2. Step 2: Convert to fraction form
    13,287.02/18,336.10 = 7,318.70/x
  3. Step 3: Cross multiply
    13,287.02x = 18,336.10 × 7,318.70
  4. Step 4: Simplify right side
    13,287.02x = 134,196,305.09
  5. Step 5: Solve for x
    x = 134,196,305.09/13,287.02
  6. Step 6: Final answer
    x = 10,099.81

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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.