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Finding the Fourth Proportional to 8,557.90, 12,856.05 and 5,965.90

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Solution

The fourth proportional to 8,557.90, 12,856.05 and 5,965.90 is: 8,962.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,557.90 : 12,856.05 = 5,965.90 : x
  2. Step 2: Convert to fraction form
    8,557.90/12,856.05 = 5,965.90/x
  3. Step 3: Cross multiply
    8,557.90x = 12,856.05 × 5,965.90
  4. Step 4: Simplify right side
    8,557.90x = 76,697,908.70
  5. Step 5: Solve for x
    x = 76,697,908.70/8,557.90
  6. Step 6: Final answer
    x = 8,962.23

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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.