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Finding the Fourth Proportional to 8,570.88, 12,856.10 and 3,953.88

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Solution

The fourth proportional to 8,570.88, 12,856.10 and 3,953.88 is: 5,930.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,570.88 : 12,856.10 = 3,953.88 : x
  2. Step 2: Convert to fraction form
    8,570.88/12,856.10 = 3,953.88/x
  3. Step 3: Cross multiply
    8,570.88x = 12,856.10 × 3,953.88
  4. Step 4: Simplify right side
    8,570.88x = 50,831,476.67
  5. Step 5: Solve for x
    x = 50,831,476.67/8,570.88
  6. Step 6: Final answer
    x = 5,930.72

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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.