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Finding the Fourth Proportional to 13,996, 19,314.57 and 7,708.78

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Solution

The fourth proportional to 13,996, 19,314.57 and 7,708.78 is: 10,638.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,996 : 19,314.57 = 7,708.78 : x
  2. Step 2: Convert to fraction form
    13,996/19,314.57 = 7,708.78/x
  3. Step 3: Cross multiply
    13,996x = 19,314.57 × 7,708.78
  4. Step 4: Simplify right side
    13,996x = 148,891,770.92
  5. Step 5: Solve for x
    x = 148,891,770.92/13,996
  6. Step 6: Final answer
    x = 10,638.17

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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.