Home / 12,831.05-17,705.85-7,165.36

Finding the Fourth Proportional to 12,831.05, 17,705.85 and 7,165.36

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Solution

The fourth proportional to 12,831.05, 17,705.85 and 7,165.36 is: 9,887.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,831.05 : 17,705.85 = 7,165.36 : x
  2. Step 2: Convert to fraction form
    12,831.05/17,705.85 = 7,165.36/x
  3. Step 3: Cross multiply
    12,831.05x = 17,705.85 × 7,165.36
  4. Step 4: Simplify right side
    12,831.05x = 126,868,784.62
  5. Step 5: Solve for x
    x = 126,868,784.62/12,831.05
  6. Step 6: Final answer
    x = 9,887.64

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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.