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Finding the Fourth Proportional to 6,665.72, 9,216.21 and 6,560.46

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Solution

The fourth proportional to 6,665.72, 9,216.21 and 6,560.46 is: 9,070.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,665.72 : 9,216.21 = 6,560.46 : x
  2. Step 2: Convert to fraction form
    6,665.72/9,216.21 = 6,560.46/x
  3. Step 3: Cross multiply
    6,665.72x = 9,216.21 × 6,560.46
  4. Step 4: Simplify right side
    6,665.72x = 60,462,577.06
  5. Step 5: Solve for x
    x = 60,462,577.06/6,665.72
  6. Step 6: Final answer
    x = 9,070.68

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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.