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Finding the Fourth Proportional to 15,810.11, 21,818.39 and 8,736.99

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Solution

The fourth proportional to 15,810.11, 21,818.39 and 8,736.99 is: 12,057.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,810.11 : 21,818.39 = 8,736.99 : x
  2. Step 2: Convert to fraction form
    15,810.11/21,818.39 = 8,736.99/x
  3. Step 3: Cross multiply
    15,810.11x = 21,818.39 × 8,736.99
  4. Step 4: Simplify right side
    15,810.11x = 190,627,011.56
  5. Step 5: Solve for x
    x = 190,627,011.56/15,810.11
  6. Step 6: Final answer
    x = 12,057.29

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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.