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Finding the Fourth Proportional to 13,908.64, 19,192.86 and 7,939.49

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Solution

The fourth proportional to 13,908.64, 19,192.86 and 7,939.49 is: 10,955.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,908.64 : 19,192.86 = 7,939.49 : x
  2. Step 2: Convert to fraction form
    13,908.64/19,192.86 = 7,939.49/x
  3. Step 3: Cross multiply
    13,908.64x = 19,192.86 × 7,939.49
  4. Step 4: Simplify right side
    13,908.64x = 152,381,597.18
  5. Step 5: Solve for x
    x = 152,381,597.18/13,908.64
  6. Step 6: Final answer
    x = 10,955.90

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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.