Home / 11,831.40-16,329.60-8,656.20

Finding the Fourth Proportional to 11,831.40, 16,329.60 and 8,656.20

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Solution

The fourth proportional to 11,831.40, 16,329.60 and 8,656.20 is: 11,947.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,831.40 : 16,329.60 = 8,656.20 : x
  2. Step 2: Convert to fraction form
    11,831.40/16,329.60 = 8,656.20/x
  3. Step 3: Cross multiply
    11,831.40x = 16,329.60 × 8,656.20
  4. Step 4: Simplify right side
    11,831.40x = 141,352,283.52
  5. Step 5: Solve for x
    x = 141,352,283.52/11,831.40
  6. Step 6: Final answer
    x = 11,947.22

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Double scale
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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.