Home / 21,831.66-30,127.53-12,879.18

Finding the Fourth Proportional to 21,831.66, 30,127.53 and 12,879.18

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Solution

The fourth proportional to 21,831.66, 30,127.53 and 12,879.18 is: 17,773.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,831.66 : 30,127.53 = 12,879.18 : x
  2. Step 2: Convert to fraction form
    21,831.66/30,127.53 = 12,879.18/x
  3. Step 3: Cross multiply
    21,831.66x = 30,127.53 × 12,879.18
  4. Step 4: Simplify right side
    21,831.66x = 388,017,881.83
  5. Step 5: Solve for x
    x = 388,017,881.83/21,831.66
  6. Step 6: Final answer
    x = 17,773.17

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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.