Home / 13,115.32-18,099.20-7,147.05

Finding the Fourth Proportional to 13,115.32, 18,099.20 and 7,147.05

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Solution

The fourth proportional to 13,115.32, 18,099.20 and 7,147.05 is: 9,862.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,115.32 : 18,099.20 = 7,147.05 : x
  2. Step 2: Convert to fraction form
    13,115.32/18,099.20 = 7,147.05/x
  3. Step 3: Cross multiply
    13,115.32x = 18,099.20 × 7,147.05
  4. Step 4: Simplify right side
    13,115.32x = 129,355,887.36
  5. Step 5: Solve for x
    x = 129,355,887.36/13,115.32
  6. Step 6: Final answer
    x = 9,862.96

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Half scale
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Double scale
Find fourth proportional to 13,116.32, 18,100.58 and 7,148.05
Similar ratio
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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.