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Finding the Fourth Proportional to 15,770.43, 21,764.21 and 8,696.88

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Solution

The fourth proportional to 15,770.43, 21,764.21 and 8,696.88 is: 12,002.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,770.43 : 21,764.21 = 8,696.88 : x
  2. Step 2: Convert to fraction form
    15,770.43/21,764.21 = 8,696.88/x
  3. Step 3: Cross multiply
    15,770.43x = 21,764.21 × 8,696.88
  4. Step 4: Simplify right side
    15,770.43x = 189,280,679.18
  5. Step 5: Solve for x
    x = 189,280,679.18/15,770.43
  6. Step 6: Final answer
    x = 12,002.25

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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.