Home / 13,117.37-18,102.20-7,149.15

Finding the Fourth Proportional to 13,117.37, 18,102.20 and 7,149.15

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Solution

The fourth proportional to 13,117.37, 18,102.20 and 7,149.15 is: 9,865.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,117.37 : 18,102.20 = 7,149.15 : x
  2. Step 2: Convert to fraction form
    13,117.37/18,102.20 = 7,149.15/x
  3. Step 3: Cross multiply
    13,117.37x = 18,102.20 × 7,149.15
  4. Step 4: Simplify right side
    13,117.37x = 129,415,307.38
  5. Step 5: Solve for x
    x = 129,415,307.38/13,117.37
  6. Step 6: Final answer
    x = 9,865.95

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Half scale
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Double scale
Find fourth proportional to 13,118.37, 18,103.58 and 7,150.15
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.