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Finding the Fourth Proportional to 35,520, 49,017.60 and 20,616

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Solution

The fourth proportional to 35,520, 49,017.60 and 20,616 is: 28,450.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,520 : 49,017.60 = 20,616 : x
  2. Step 2: Convert to fraction form
    35,520/49,017.60 = 20,616/x
  3. Step 3: Cross multiply
    35,520x = 49,017.60 × 20,616
  4. Step 4: Simplify right side
    35,520x = 1,010,546,841.60
  5. Step 5: Solve for x
    x = 1,010,546,841.60/35,520
  6. Step 6: Final answer
    x = 28,450.08

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.