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Finding the Fourth Proportional to 28,880.86, 43,322.82 and 9,157.90

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Solution

The fourth proportional to 28,880.86, 43,322.82 and 9,157.90 is: 13,737.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,880.86 : 43,322.82 = 9,157.90 : x
  2. Step 2: Convert to fraction form
    28,880.86/43,322.82 = 9,157.90/x
  3. Step 3: Cross multiply
    28,880.86x = 43,322.82 × 9,157.90
  4. Step 4: Simplify right side
    28,880.86x = 396,746,053.28
  5. Step 5: Solve for x
    x = 396,746,053.28/28,880.86
  6. Step 6: Final answer
    x = 13,737.34

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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.