Home / 21,814.36-30,102.78-12,381.64

Finding the Fourth Proportional to 21,814.36, 30,102.78 and 12,381.64

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Solution

The fourth proportional to 21,814.36, 30,102.78 and 12,381.64 is: 17,086.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,814.36 : 30,102.78 = 12,381.64 : x
  2. Step 2: Convert to fraction form
    21,814.36/30,102.78 = 12,381.64/x
  3. Step 3: Cross multiply
    21,814.36x = 30,102.78 × 12,381.64
  4. Step 4: Simplify right side
    21,814.36x = 372,721,784.96
  5. Step 5: Solve for x
    x = 372,721,784.96/21,814.36
  6. Step 6: Final answer
    x = 17,086.07

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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.