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Finding the Fourth Proportional to 3,636.08, 5,017.64 and 1,980.08

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Solution

The fourth proportional to 3,636.08, 5,017.64 and 1,980.08 is: 2,732.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,636.08 : 5,017.64 = 1,980.08 : x
  2. Step 2: Convert to fraction form
    3,636.08/5,017.64 = 1,980.08/x
  3. Step 3: Cross multiply
    3,636.08x = 5,017.64 × 1,980.08
  4. Step 4: Simplify right side
    3,636.08x = 9,935,328.61
  5. Step 5: Solve for x
    x = 9,935,328.61/3,636.08
  6. Step 6: Final answer
    x = 2,732.43

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1.5x scale

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.