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Finding the Fourth Proportional to 13,668.45, 18,859.14 and 7,700.11

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Solution

The fourth proportional to 13,668.45, 18,859.14 and 7,700.11 is: 10,624.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,668.45 : 18,859.14 = 7,700.11 : x
  2. Step 2: Convert to fraction form
    13,668.45/18,859.14 = 7,700.11/x
  3. Step 3: Cross multiply
    13,668.45x = 18,859.14 × 7,700.11
  4. Step 4: Simplify right side
    13,668.45x = 145,217,452.51
  5. Step 5: Solve for x
    x = 145,217,452.51/13,668.45
  6. Step 6: Final answer
    x = 10,624.28

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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.