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Finding the Fourth Proportional to 28,365.08, 39,141.11 and 15,618.11

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Solution

The fourth proportional to 28,365.08, 39,141.11 and 15,618.11 is: 21,551.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,365.08 : 39,141.11 = 15,618.11 : x
  2. Step 2: Convert to fraction form
    28,365.08/39,141.11 = 15,618.11/x
  3. Step 3: Cross multiply
    28,365.08x = 39,141.11 × 15,618.11
  4. Step 4: Simplify right side
    28,365.08x = 611,310,083.41
  5. Step 5: Solve for x
    x = 611,310,083.41/28,365.08
  6. Step 6: Final answer
    x = 21,551.50

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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.