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Finding the Fourth Proportional to 6,665.55, 9,981.21 and 6,468.45

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Solution

The fourth proportional to 6,665.55, 9,981.21 and 6,468.45 is: 9,686.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,665.55 : 9,981.21 = 6,468.45 : x
  2. Step 2: Convert to fraction form
    6,665.55/9,981.21 = 6,468.45/x
  3. Step 3: Cross multiply
    6,665.55x = 9,981.21 × 6,468.45
  4. Step 4: Simplify right side
    6,665.55x = 64,562,957.82
  5. Step 5: Solve for x
    x = 64,562,957.82/6,665.55
  6. Step 6: Final answer
    x = 9,686.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.