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Finding the Fourth Proportional to 13,668.84, 18,863.28 and 7,700.76

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Solution

The fourth proportional to 13,668.84, 18,863.28 and 7,700.76 is: 10,627.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,668.84 : 18,863.28 = 7,700.76 : x
  2. Step 2: Convert to fraction form
    13,668.84/18,863.28 = 7,700.76/x
  3. Step 3: Cross multiply
    13,668.84x = 18,863.28 × 7,700.76
  4. Step 4: Simplify right side
    13,668.84x = 145,261,592.09
  5. Step 5: Solve for x
    x = 145,261,592.09/13,668.84
  6. Step 6: Final answer
    x = 10,627.21

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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.