Home / 21,831.16-30,127-11,895.16

Finding the Fourth Proportional to 21,831.16, 30,127 and 11,895.16

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Solution

The fourth proportional to 21,831.16, 30,127 and 11,895.16 is: 16,415.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,831.16 : 30,127 = 11,895.16 : x
  2. Step 2: Convert to fraction form
    21,831.16/30,127 = 11,895.16/x
  3. Step 3: Cross multiply
    21,831.16x = 30,127 × 11,895.16
  4. Step 4: Simplify right side
    21,831.16x = 358,365,485.32
  5. Step 5: Solve for x
    x = 358,365,485.32/21,831.16
  6. Step 6: Final answer
    x = 16,415.32

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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.