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Finding the Fourth Proportional to 15,810.85, 21,818.10 and 8,736.82

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Solution

The fourth proportional to 15,810.85, 21,818.10 and 8,736.82 is: 12,056.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,810.85 : 21,818.10 = 8,736.82 : x
  2. Step 2: Convert to fraction form
    15,810.85/21,818.10 = 8,736.82/x
  3. Step 3: Cross multiply
    15,810.85x = 21,818.10 × 8,736.82
  4. Step 4: Simplify right side
    15,810.85x = 190,620,812.44
  5. Step 5: Solve for x
    x = 190,620,812.44/15,810.85
  6. Step 6: Final answer
    x = 12,056.33

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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.