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Finding the Fourth Proportional to 13,868.20, 19,136.82 and 7,901.20

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Solution

The fourth proportional to 13,868.20, 19,136.82 and 7,901.20 is: 10,902.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,868.20 : 19,136.82 = 7,901.20 : x
  2. Step 2: Convert to fraction form
    13,868.20/19,136.82 = 7,901.20/x
  3. Step 3: Cross multiply
    13,868.20x = 19,136.82 × 7,901.20
  4. Step 4: Simplify right side
    13,868.20x = 151,203,842.18
  5. Step 5: Solve for x
    x = 151,203,842.18/13,868.20
  6. Step 6: Final answer
    x = 10,902.92

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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.