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Finding the Fourth Proportional to 8,605.48, 12,886.34 and 5,674.90

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Solution

The fourth proportional to 8,605.48, 12,886.34 and 5,674.90 is: 8,497.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,605.48 : 12,886.34 = 5,674.90 : x
  2. Step 2: Convert to fraction form
    8,605.48/12,886.34 = 5,674.90/x
  3. Step 3: Cross multiply
    8,605.48x = 12,886.34 × 5,674.90
  4. Step 4: Simplify right side
    8,605.48x = 73,128,690.87
  5. Step 5: Solve for x
    x = 73,128,690.87/8,605.48
  6. Step 6: Final answer
    x = 8,497.92

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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.