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Finding the Fourth Proportional to 15,080.76, 20,831.40 and 12,571.08

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Solution

The fourth proportional to 15,080.76, 20,831.40 and 12,571.08 is: 17,364.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,080.76 : 20,831.40 = 12,571.08 : x
  2. Step 2: Convert to fraction form
    15,080.76/20,831.40 = 12,571.08/x
  3. Step 3: Cross multiply
    15,080.76x = 20,831.40 × 12,571.08
  4. Step 4: Simplify right side
    15,080.76x = 261,873,195.91
  5. Step 5: Solve for x
    x = 261,873,195.91/15,080.76
  6. Step 6: Final answer
    x = 17,364.72

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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.