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Finding the Fourth Proportional to 8,570.14, 12,856.82 and 3,890.48

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Solution

The fourth proportional to 8,570.14, 12,856.82 and 3,890.48 is: 5,836.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,570.14 : 12,856.82 = 3,890.48 : x
  2. Step 2: Convert to fraction form
    8,570.14/12,856.82 = 3,890.48/x
  3. Step 3: Cross multiply
    8,570.14x = 12,856.82 × 3,890.48
  4. Step 4: Simplify right side
    8,570.14x = 50,019,208.81
  5. Step 5: Solve for x
    x = 50,019,208.81/8,570.14
  6. Step 6: Final answer
    x = 5,836.45

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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.