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Finding the Fourth Proportional to 7,965.58, 10,998.94 and 7,124.80

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Solution

The fourth proportional to 7,965.58, 10,998.94 and 7,124.80 is: 9,837.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,965.58 : 10,998.94 = 7,124.80 : x
  2. Step 2: Convert to fraction form
    7,965.58/10,998.94 = 7,124.80/x
  3. Step 3: Cross multiply
    7,965.58x = 10,998.94 × 7,124.80
  4. Step 4: Simplify right side
    7,965.58x = 78,365,247.71
  5. Step 5: Solve for x
    x = 78,365,247.71/7,965.58
  6. Step 6: Final answer
    x = 9,837.98

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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.