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Finding the Fourth Proportional to 28,520.91, 42,785.82 and 8,803.89

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Solution

The fourth proportional to 28,520.91, 42,785.82 and 8,803.89 is: 13,207.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,520.91 : 42,785.82 = 8,803.89 : x
  2. Step 2: Convert to fraction form
    28,520.91/42,785.82 = 8,803.89/x
  3. Step 3: Cross multiply
    28,520.91x = 42,785.82 × 8,803.89
  4. Step 4: Simplify right side
    28,520.91x = 376,681,652.84
  5. Step 5: Solve for x
    x = 376,681,652.84/28,520.91
  6. Step 6: Final answer
    x = 13,207.21

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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.