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Finding the Fourth Proportional to 8,655.48, 11,940.30 and 8,320.14

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Solution

The fourth proportional to 8,655.48, 11,940.30 and 8,320.14 is: 11,477.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,655.48 : 11,940.30 = 8,320.14 : x
  2. Step 2: Convert to fraction form
    8,655.48/11,940.30 = 8,320.14/x
  3. Step 3: Cross multiply
    8,655.48x = 11,940.30 × 8,320.14
  4. Step 4: Simplify right side
    8,655.48x = 99,344,967.64
  5. Step 5: Solve for x
    x = 99,344,967.64/8,655.48
  6. Step 6: Final answer
    x = 11,477.70

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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.