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Finding the Fourth Proportional to 12,660.79, 17,470.98 and 6,995.47

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Solution

The fourth proportional to 12,660.79, 17,470.98 and 6,995.47 is: 9,653.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,660.79 : 17,470.98 = 6,995.47 : x
  2. Step 2: Convert to fraction form
    12,660.79/17,470.98 = 6,995.47/x
  3. Step 3: Cross multiply
    12,660.79x = 17,470.98 × 6,995.47
  4. Step 4: Simplify right side
    12,660.79x = 122,217,716.46
  5. Step 5: Solve for x
    x = 122,217,716.46/12,660.79
  6. Step 6: Final answer
    x = 9,653.25

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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.