Home / 10,831.20-16,279.20-9,405.60

Finding the Fourth Proportional to 10,831.20, 16,279.20 and 9,405.60

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Solution

The fourth proportional to 10,831.20, 16,279.20 and 9,405.60 is: 14,136.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,831.20 : 16,279.20 = 9,405.60 : x
  2. Step 2: Convert to fraction form
    10,831.20/16,279.20 = 9,405.60/x
  3. Step 3: Cross multiply
    10,831.20x = 16,279.20 × 9,405.60
  4. Step 4: Simplify right side
    10,831.20x = 153,115,643.52
  5. Step 5: Solve for x
    x = 153,115,643.52/10,831.20
  6. Step 6: Final answer
    x = 14,136.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.