Home / 13,107.96-18,095.19-7,728.75

Finding the Fourth Proportional to 13,107.96, 18,095.19 and 7,728.75

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Solution

The fourth proportional to 13,107.96, 18,095.19 and 7,728.75 is: 10,669.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,107.96 : 18,095.19 = 7,728.75 : x
  2. Step 2: Convert to fraction form
    13,107.96/18,095.19 = 7,728.75/x
  3. Step 3: Cross multiply
    13,107.96x = 18,095.19 × 7,728.75
  4. Step 4: Simplify right side
    13,107.96x = 139,853,199.71
  5. Step 5: Solve for x
    x = 139,853,199.71/13,107.96
  6. Step 6: Final answer
    x = 10,669.33

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Half scale
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Double scale
Find fourth proportional to 13,108.96, 18,096.57 and 7,729.75
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.