Home / 28,257.47-38,995.78-15,511.85

Finding the Fourth Proportional to 28,257.47, 38,995.78 and 15,511.85

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Solution

The fourth proportional to 28,257.47, 38,995.78 and 15,511.85 is: 21,406.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,257.47 : 38,995.78 = 15,511.85 : x
  2. Step 2: Convert to fraction form
    28,257.47/38,995.78 = 15,511.85/x
  3. Step 3: Cross multiply
    28,257.47x = 38,995.78 × 15,511.85
  4. Step 4: Simplify right side
    28,257.47x = 604,896,456.23
  5. Step 5: Solve for x
    x = 604,896,456.23/28,257.47
  6. Step 6: Final answer
    x = 21,406.61

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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.