Home / 18,831.16-25,987.82-11,278.72

Finding the Fourth Proportional to 18,831.16, 25,987.82 and 11,278.72

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Solution

The fourth proportional to 18,831.16, 25,987.82 and 11,278.72 is: 15,565.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,831.16 : 25,987.82 = 11,278.72 : x
  2. Step 2: Convert to fraction form
    18,831.16/25,987.82 = 11,278.72/x
  3. Step 3: Cross multiply
    18,831.16x = 25,987.82 × 11,278.72
  4. Step 4: Simplify right side
    18,831.16x = 293,109,345.19
  5. Step 5: Solve for x
    x = 293,109,345.19/18,831.16
  6. Step 6: Final answer
    x = 15,565.12

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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.