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Finding the Fourth Proportional to 3,718.77, 5,130.99 and 2,146.86

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Solution

The fourth proportional to 3,718.77, 5,130.99 and 2,146.86 is: 2,962.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,718.77 : 5,130.99 = 2,146.86 : x
  2. Step 2: Convert to fraction form
    3,718.77/5,130.99 = 2,146.86/x
  3. Step 3: Cross multiply
    3,718.77x = 5,130.99 × 2,146.86
  4. Step 4: Simplify right side
    3,718.77x = 11,015,517.19
  5. Step 5: Solve for x
    x = 11,015,517.19/3,718.77
  6. Step 6: Final answer
    x = 2,962.14

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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.