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Finding the Fourth Proportional to 25,863.66, 38,785.74 and 8,328.78

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Solution

The fourth proportional to 25,863.66, 38,785.74 and 8,328.78 is: 12,490.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,863.66 : 38,785.74 = 8,328.78 : x
  2. Step 2: Convert to fraction form
    25,863.66/38,785.74 = 8,328.78/x
  3. Step 3: Cross multiply
    25,863.66x = 38,785.74 × 8,328.78
  4. Step 4: Simplify right side
    25,863.66x = 323,037,895.60
  5. Step 5: Solve for x
    x = 323,037,895.60/25,863.66
  6. Step 6: Final answer
    x = 12,490.03

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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.