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Finding the Fourth Proportional to 28,346, 42,520.80 and 8,626.01

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Solution

The fourth proportional to 28,346, 42,520.80 and 8,626.01 is: 12,939.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,346 : 42,520.80 = 8,626.01 : x
  2. Step 2: Convert to fraction form
    28,346/42,520.80 = 8,626.01/x
  3. Step 3: Cross multiply
    28,346x = 42,520.80 × 8,626.01
  4. Step 4: Simplify right side
    28,346x = 366,784,846.01
  5. Step 5: Solve for x
    x = 366,784,846.01/28,346
  6. Step 6: Final answer
    x = 12,939.56

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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.