Home / 21,811.96-30,102.06-12,381.13

Finding the Fourth Proportional to 21,811.96, 30,102.06 and 12,381.13

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Solution

The fourth proportional to 21,811.96, 30,102.06 and 12,381.13 is: 17,086.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,811.96 : 30,102.06 = 12,381.13 : x
  2. Step 2: Convert to fraction form
    21,811.96/30,102.06 = 12,381.13/x
  3. Step 3: Cross multiply
    21,811.96x = 30,102.06 × 12,381.13
  4. Step 4: Simplify right side
    21,811.96x = 372,697,518.13
  5. Step 5: Solve for x
    x = 372,697,518.13/21,811.96
  6. Step 6: Final answer
    x = 17,086.84

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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.