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Finding the Fourth Proportional to 8,911.52, 12,290.44 and 6,678.64

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Solution

The fourth proportional to 8,911.52, 12,290.44 and 6,678.64 is: 9,210.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,911.52 : 12,290.44 = 6,678.64 : x
  2. Step 2: Convert to fraction form
    8,911.52/12,290.44 = 6,678.64/x
  3. Step 3: Cross multiply
    8,911.52x = 12,290.44 × 6,678.64
  4. Step 4: Simplify right side
    8,911.52x = 82,083,424.20
  5. Step 5: Solve for x
    x = 82,083,424.20/8,911.52
  6. Step 6: Final answer
    x = 9,210.93

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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.