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Finding the Fourth Proportional to 28,583.73, 42,880.14 and 8,858.21

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Solution

The fourth proportional to 28,583.73, 42,880.14 and 8,858.21 is: 13,288.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,583.73 : 42,880.14 = 8,858.21 : x
  2. Step 2: Convert to fraction form
    28,583.73/42,880.14 = 8,858.21/x
  3. Step 3: Cross multiply
    28,583.73x = 42,880.14 × 8,858.21
  4. Step 4: Simplify right side
    28,583.73x = 379,841,070.55
  5. Step 5: Solve for x
    x = 379,841,070.55/28,583.73
  6. Step 6: Final answer
    x = 13,288.72

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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.