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Finding the Fourth Proportional to 13,597.13, 18,764.31 and 7,629.21

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Solution

The fourth proportional to 13,597.13, 18,764.31 and 7,629.21 is: 10,528.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,597.13 : 18,764.31 = 7,629.21 : x
  2. Step 2: Convert to fraction form
    13,597.13/18,764.31 = 7,629.21/x
  3. Step 3: Cross multiply
    13,597.13x = 18,764.31 × 7,629.21
  4. Step 4: Simplify right side
    13,597.13x = 143,156,861.50
  5. Step 5: Solve for x
    x = 143,156,861.50/13,597.13
  6. Step 6: Final answer
    x = 10,528.47

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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.