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Finding the Fourth Proportional to 15,087.60, 20,831.04 and 11,544.48

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Solution

The fourth proportional to 15,087.60, 20,831.04 and 11,544.48 is: 15,939.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,087.60 : 20,831.04 = 11,544.48 : x
  2. Step 2: Convert to fraction form
    15,087.60/20,831.04 = 11,544.48/x
  3. Step 3: Cross multiply
    15,087.60x = 20,831.04 × 11,544.48
  4. Step 4: Simplify right side
    15,087.60x = 240,483,524.66
  5. Step 5: Solve for x
    x = 240,483,524.66/15,087.60
  6. Step 6: Final answer
    x = 15,939.15

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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.