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Finding the Fourth Proportional to 13,668.57, 18,861.41 and 7,618.59

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Solution

The fourth proportional to 13,668.57, 18,861.41 and 7,618.59 is: 10,512.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,668.57 : 18,861.41 = 7,618.59 : x
  2. Step 2: Convert to fraction form
    13,668.57/18,861.41 = 7,618.59/x
  3. Step 3: Cross multiply
    13,668.57x = 18,861.41 × 7,618.59
  4. Step 4: Simplify right side
    13,668.57x = 143,697,368.66
  5. Step 5: Solve for x
    x = 143,697,368.66/13,668.57
  6. Step 6: Final answer
    x = 10,512.98

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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.