Home / 3,154.19-4,356.44-2,157.72

Finding the Fourth Proportional to 3,154.19, 4,356.44 and 2,157.72

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Solution

The fourth proportional to 3,154.19, 4,356.44 and 2,157.72 is: 2,980.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,154.19 : 4,356.44 = 2,157.72 : x
  2. Step 2: Convert to fraction form
    3,154.19/4,356.44 = 2,157.72/x
  3. Step 3: Cross multiply
    3,154.19x = 4,356.44 × 2,157.72
  4. Step 4: Simplify right side
    3,154.19x = 9,399,966.93
  5. Step 5: Solve for x
    x = 9,399,966.93/3,154.19
  6. Step 6: Final answer
    x = 2,980.16

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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.