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Finding the Fourth Proportional to 28,612.73, 39,486.04 and 15,866.45

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Solution

The fourth proportional to 28,612.73, 39,486.04 and 15,866.45 is: 21,895.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,612.73 : 39,486.04 = 15,866.45 : x
  2. Step 2: Convert to fraction form
    28,612.73/39,486.04 = 15,866.45/x
  3. Step 3: Cross multiply
    28,612.73x = 39,486.04 × 15,866.45
  4. Step 4: Simplify right side
    28,612.73x = 626,503,323.87
  5. Step 5: Solve for x
    x = 626,503,323.87/28,612.73
  6. Step 6: Final answer
    x = 21,895.96

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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.