Home / 21,935.10-30,270.70-13,318.83

Finding the Fourth Proportional to 21,935.10, 30,270.70 and 13,318.83

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Solution

The fourth proportional to 21,935.10, 30,270.70 and 13,318.83 is: 18,380.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,935.10 : 30,270.70 = 13,318.83 : x
  2. Step 2: Convert to fraction form
    21,935.10/30,270.70 = 13,318.83/x
  3. Step 3: Cross multiply
    21,935.10x = 30,270.70 × 13,318.83
  4. Step 4: Simplify right side
    21,935.10x = 403,170,305.20
  5. Step 5: Solve for x
    x = 403,170,305.20/21,935.10
  6. Step 6: Final answer
    x = 18,380.15

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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.