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Finding the Fourth Proportional to 7,740.36, 10,677.06 and 7,221.96

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Solution

The fourth proportional to 7,740.36, 10,677.06 and 7,221.96 is: 9,961.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,740.36 : 10,677.06 = 7,221.96 : x
  2. Step 2: Convert to fraction form
    7,740.36/10,677.06 = 7,221.96/x
  3. Step 3: Cross multiply
    7,740.36x = 10,677.06 × 7,221.96
  4. Step 4: Simplify right side
    7,740.36x = 77,109,300.24
  5. Step 5: Solve for x
    x = 77,109,300.24/7,740.36
  6. Step 6: Final answer
    x = 9,961.98

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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.