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Finding the Fourth Proportional to 8,657.10, 12,986.04 and 4,218.84

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Solution

The fourth proportional to 8,657.10, 12,986.04 and 4,218.84 is: 6,328.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,657.10 : 12,986.04 = 4,218.84 : x
  2. Step 2: Convert to fraction form
    8,657.10/12,986.04 = 4,218.84/x
  3. Step 3: Cross multiply
    8,657.10x = 12,986.04 × 4,218.84
  4. Step 4: Simplify right side
    8,657.10x = 54,786,024.99
  5. Step 5: Solve for x
    x = 54,786,024.99/8,657.10
  6. Step 6: Final answer
    x = 6,328.45

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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.