Home / 28,196.91-38,913-15,620.85

Finding the Fourth Proportional to 28,196.91, 38,913 and 15,620.85

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Solution

The fourth proportional to 28,196.91, 38,913 and 15,620.85 is: 21,557.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,196.91 : 38,913 = 15,620.85 : x
  2. Step 2: Convert to fraction form
    28,196.91/38,913 = 15,620.85/x
  3. Step 3: Cross multiply
    28,196.91x = 38,913 × 15,620.85
  4. Step 4: Simplify right side
    28,196.91x = 607,854,136.05
  5. Step 5: Solve for x
    x = 607,854,136.05/28,196.91
  6. Step 6: Final answer
    x = 21,557.47

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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.