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Finding the Fourth Proportional to 8,647.80, 11,935.08 and 5,289.96

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Solution

The fourth proportional to 8,647.80, 11,935.08 and 5,289.96 is: 7,300.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,647.80 : 11,935.08 = 5,289.96 : x
  2. Step 2: Convert to fraction form
    8,647.80/11,935.08 = 5,289.96/x
  3. Step 3: Cross multiply
    8,647.80x = 11,935.08 × 5,289.96
  4. Step 4: Simplify right side
    8,647.80x = 63,136,095.80
  5. Step 5: Solve for x
    x = 63,136,095.80/8,647.80
  6. Step 6: Final answer
    x = 7,300.83

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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.