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Finding the Fourth Proportional to 15,119.72, 20,857.06 and 8,831.08

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Solution

The fourth proportional to 15,119.72, 20,857.06 and 8,831.08 is: 12,182.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,119.72 : 20,857.06 = 8,831.08 : x
  2. Step 2: Convert to fraction form
    15,119.72/20,857.06 = 8,831.08/x
  3. Step 3: Cross multiply
    15,119.72x = 20,857.06 × 8,831.08
  4. Step 4: Simplify right side
    15,119.72x = 184,190,365.42
  5. Step 5: Solve for x
    x = 184,190,365.42/15,119.72
  6. Step 6: Final answer
    x = 12,182.13

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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.