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Finding the Fourth Proportional to 28,766.61, 43,141.95 and 18,220.95

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Solution

The fourth proportional to 28,766.61, 43,141.95 and 18,220.95 is: 27,326.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,766.61 : 43,141.95 = 18,220.95 : x
  2. Step 2: Convert to fraction form
    28,766.61/43,141.95 = 18,220.95/x
  3. Step 3: Cross multiply
    28,766.61x = 43,141.95 × 18,220.95
  4. Step 4: Simplify right side
    28,766.61x = 786,087,313.85
  5. Step 5: Solve for x
    x = 786,087,313.85/28,766.61
  6. Step 6: Final answer
    x = 27,326.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.