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Finding the Fourth Proportional to 12,868.64, 17,759.10 and 7,126.16

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Solution

The fourth proportional to 12,868.64, 17,759.10 and 7,126.16 is: 9,834.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,868.64 : 17,759.10 = 7,126.16 : x
  2. Step 2: Convert to fraction form
    12,868.64/17,759.10 = 7,126.16/x
  3. Step 3: Cross multiply
    12,868.64x = 17,759.10 × 7,126.16
  4. Step 4: Simplify right side
    12,868.64x = 126,554,188.06
  5. Step 5: Solve for x
    x = 126,554,188.06/12,868.64
  6. Step 6: Final answer
    x = 9,834.31

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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.