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Finding the Fourth Proportional to 7,698.60, 10,659.06 and 7,309.80

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Solution

The fourth proportional to 7,698.60, 10,659.06 and 7,309.80 is: 10,120.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,698.60 : 10,659.06 = 7,309.80 : x
  2. Step 2: Convert to fraction form
    7,698.60/10,659.06 = 7,309.80/x
  3. Step 3: Cross multiply
    7,698.60x = 10,659.06 × 7,309.80
  4. Step 4: Simplify right side
    7,698.60x = 77,915,596.79
  5. Step 5: Solve for x
    x = 77,915,596.79/7,698.60
  6. Step 6: Final answer
    x = 10,120.75

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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.