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Finding the Fourth Proportional to 28,533.80, 42,805.31 and 8,807.74

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Solution

The fourth proportional to 28,533.80, 42,805.31 and 8,807.74 is: 13,213.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,533.80 : 42,805.31 = 8,807.74 : x
  2. Step 2: Convert to fraction form
    28,533.80/42,805.31 = 8,807.74/x
  3. Step 3: Cross multiply
    28,533.80x = 42,805.31 × 8,807.74
  4. Step 4: Simplify right side
    28,533.80x = 377,017,890.05
  5. Step 5: Solve for x
    x = 377,017,890.05/28,533.80
  6. Step 6: Final answer
    x = 13,213.03

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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.