Home / 21,936.70-30,270.62-13,434.94

Finding the Fourth Proportional to 21,936.70, 30,270.62 and 13,434.94

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Solution

The fourth proportional to 21,936.70, 30,270.62 and 13,434.94 is: 18,538.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,936.70 : 30,270.62 = 13,434.94 : x
  2. Step 2: Convert to fraction form
    21,936.70/30,270.62 = 13,434.94/x
  3. Step 3: Cross multiply
    21,936.70x = 30,270.62 × 13,434.94
  4. Step 4: Simplify right side
    21,936.70x = 406,683,963.46
  5. Step 5: Solve for x
    x = 406,683,963.46/21,936.70
  6. Step 6: Final answer
    x = 18,538.98

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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.