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Finding the Fourth Proportional to 3,651.80, 4,931.55 and 3,651.80

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Solution

The fourth proportional to 3,651.80, 4,931.55 and 3,651.80 is: 4,931.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,651.80 : 4,931.55 = 3,651.80 : x
  2. Step 2: Convert to fraction form
    3,651.80/4,931.55 = 3,651.80/x
  3. Step 3: Cross multiply
    3,651.80x = 4,931.55 × 3,651.80
  4. Step 4: Simplify right side
    3,651.80x = 18,009,034.29
  5. Step 5: Solve for x
    x = 18,009,034.29/3,651.80
  6. Step 6: Final answer
    x = 4,931.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.