Home / 21,378.62-29,510.73-19,136.54

Finding the Fourth Proportional to 21,378.62, 29,510.73 and 19,136.54

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Solution

The fourth proportional to 21,378.62, 29,510.73 and 19,136.54 is: 26,415.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,378.62 : 29,510.73 = 19,136.54 : x
  2. Step 2: Convert to fraction form
    21,378.62/29,510.73 = 19,136.54/x
  3. Step 3: Cross multiply
    21,378.62x = 29,510.73 × 19,136.54
  4. Step 4: Simplify right side
    21,378.62x = 564,733,338.85
  5. Step 5: Solve for x
    x = 564,733,338.85/21,378.62
  6. Step 6: Final answer
    x = 26,415.80

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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.