Home / 21,893.18-30,213.22-13,395.16

Finding the Fourth Proportional to 21,893.18, 30,213.22 and 13,395.16

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Solution

The fourth proportional to 21,893.18, 30,213.22 and 13,395.16 is: 18,485.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,893.18 : 30,213.22 = 13,395.16 : x
  2. Step 2: Convert to fraction form
    21,893.18/30,213.22 = 13,395.16/x
  3. Step 3: Cross multiply
    21,893.18x = 30,213.22 × 13,395.16
  4. Step 4: Simplify right side
    21,893.18x = 404,710,849.04
  5. Step 5: Solve for x
    x = 404,710,849.04/21,893.18
  6. Step 6: Final answer
    x = 18,485.71

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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.