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Finding the Fourth Proportional to 15,026.31, 20,736.19 and 8,979.31

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Solution

The fourth proportional to 15,026.31, 20,736.19 and 8,979.31 is: 12,391.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,026.31 : 20,736.19 = 8,979.31 : x
  2. Step 2: Convert to fraction form
    15,026.31/20,736.19 = 8,979.31/x
  3. Step 3: Cross multiply
    15,026.31x = 20,736.19 × 8,979.31
  4. Step 4: Simplify right side
    15,026.31x = 186,196,678.23
  5. Step 5: Solve for x
    x = 186,196,678.23/15,026.31
  6. Step 6: Final answer
    x = 12,391.38

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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.