Home / 13,107.04-18,087.62-7,138.69

Finding the Fourth Proportional to 13,107.04, 18,087.62 and 7,138.69

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Solution

The fourth proportional to 13,107.04, 18,087.62 and 7,138.69 is: 9,851.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,107.04 : 18,087.62 = 7,138.69 : x
  2. Step 2: Convert to fraction form
    13,107.04/18,087.62 = 7,138.69/x
  3. Step 3: Cross multiply
    13,107.04x = 18,087.62 × 7,138.69
  4. Step 4: Simplify right side
    13,107.04x = 129,121,929.86
  5. Step 5: Solve for x
    x = 129,121,929.86/13,107.04
  6. Step 6: Final answer
    x = 9,851.34

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Half scale
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Double scale
Find fourth proportional to 13,108.04, 18,089 and 7,139.69
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.