Home / 13,115.51-18,099.16-7,147.23

Finding the Fourth Proportional to 13,115.51, 18,099.16 and 7,147.23

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Solution

The fourth proportional to 13,115.51, 18,099.16 and 7,147.23 is: 9,863.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,115.51 : 18,099.16 = 7,147.23 : x
  2. Step 2: Convert to fraction form
    13,115.51/18,099.16 = 7,147.23/x
  3. Step 3: Cross multiply
    13,115.51x = 18,099.16 × 7,147.23
  4. Step 4: Simplify right side
    13,115.51x = 129,358,859.33
  5. Step 5: Solve for x
    x = 129,358,859.33/13,115.51
  6. Step 6: Final answer
    x = 9,863.04

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Half scale
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Double scale
Find fourth proportional to 13,116.51, 18,100.54 and 7,148.23
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.