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Finding the Fourth Proportional to 8,390.76, 12,586.08 and 2,150.76

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Solution

The fourth proportional to 8,390.76, 12,586.08 and 2,150.76 is: 3,226.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,390.76 : 12,586.08 = 2,150.76 : x
  2. Step 2: Convert to fraction form
    8,390.76/12,586.08 = 2,150.76/x
  3. Step 3: Cross multiply
    8,390.76x = 12,586.08 × 2,150.76
  4. Step 4: Simplify right side
    8,390.76x = 27,069,637.42
  5. Step 5: Solve for x
    x = 27,069,637.42/8,390.76
  6. Step 6: Final answer
    x = 3,226.12

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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.