Home / 21,972.30-30,318.44-13,353.98

Finding the Fourth Proportional to 21,972.30, 30,318.44 and 13,353.98

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Solution

The fourth proportional to 21,972.30, 30,318.44 and 13,353.98 is: 18,426.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,972.30 : 30,318.44 = 13,353.98 : x
  2. Step 2: Convert to fraction form
    21,972.30/30,318.44 = 13,353.98/x
  3. Step 3: Cross multiply
    21,972.30x = 30,318.44 × 13,353.98
  4. Step 4: Simplify right side
    21,972.30x = 404,871,841.39
  5. Step 5: Solve for x
    x = 404,871,841.39/21,972.30
  6. Step 6: Final answer
    x = 18,426.47

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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.