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Finding the Fourth Proportional to 8,561.45, 12,837.04 and 3,557.78

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Solution

The fourth proportional to 8,561.45, 12,837.04 and 3,557.78 is: 5,334.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,561.45 : 12,837.04 = 3,557.78 : x
  2. Step 2: Convert to fraction form
    8,561.45/12,837.04 = 3,557.78/x
  3. Step 3: Cross multiply
    8,561.45x = 12,837.04 × 3,557.78
  4. Step 4: Simplify right side
    8,561.45x = 45,671,421.20
  5. Step 5: Solve for x
    x = 45,671,421.20/8,561.45
  6. Step 6: Final answer
    x = 5,334.55

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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.