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Finding the Fourth Proportional to 28,291.88, 39,043.88 and 15,545.60

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Solution

The fourth proportional to 28,291.88, 39,043.88 and 15,545.60 is: 21,453.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,291.88 : 39,043.88 = 15,545.60 : x
  2. Step 2: Convert to fraction form
    28,291.88/39,043.88 = 15,545.60/x
  3. Step 3: Cross multiply
    28,291.88x = 39,043.88 × 15,545.60
  4. Step 4: Simplify right side
    28,291.88x = 606,960,540.93
  5. Step 5: Solve for x
    x = 606,960,540.93/28,291.88
  6. Step 6: Final answer
    x = 21,453.52

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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.