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Finding the Fourth Proportional to 15,810.50, 21,817.64 and 8,736.47

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Solution

The fourth proportional to 15,810.50, 21,817.64 and 8,736.47 is: 12,055.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,810.50 : 21,817.64 = 8,736.47 : x
  2. Step 2: Convert to fraction form
    15,810.50/21,817.64 = 8,736.47/x
  3. Step 3: Cross multiply
    15,810.50x = 21,817.64 × 8,736.47
  4. Step 4: Simplify right side
    15,810.50x = 190,609,086.38
  5. Step 5: Solve for x
    x = 190,609,086.38/15,810.50
  6. Step 6: Final answer
    x = 12,055.85

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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.