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Finding the Fourth Proportional to 28,388.57, 42,584.76 and 8,397.77

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Solution

The fourth proportional to 28,388.57, 42,584.76 and 8,397.77 is: 12,597.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,388.57 : 42,584.76 = 8,397.77 : x
  2. Step 2: Convert to fraction form
    28,388.57/42,584.76 = 8,397.77/x
  3. Step 3: Cross multiply
    28,388.57x = 42,584.76 × 8,397.77
  4. Step 4: Simplify right side
    28,388.57x = 357,616,807.06
  5. Step 5: Solve for x
    x = 357,616,807.06/28,388.57
  6. Step 6: Final answer
    x = 12,597.21

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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.