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Finding the Fourth Proportional to 28,625.99, 39,502.47 and 15,879.68

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Solution

The fourth proportional to 28,625.99, 39,502.47 and 15,879.68 is: 21,913.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,625.99 : 39,502.47 = 15,879.68 : x
  2. Step 2: Convert to fraction form
    28,625.99/39,502.47 = 15,879.68/x
  3. Step 3: Cross multiply
    28,625.99x = 39,502.47 × 15,879.68
  4. Step 4: Simplify right side
    28,625.99x = 627,286,385.30
  5. Step 5: Solve for x
    x = 627,286,385.30/28,625.99
  6. Step 6: Final answer
    x = 21,913.18

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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.