Home / 3,172.72-4,377.01-2,125.12

Finding the Fourth Proportional to 3,172.72, 4,377.01 and 2,125.12

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Solution

The fourth proportional to 3,172.72, 4,377.01 and 2,125.12 is: 2,931.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,172.72 : 4,377.01 = 2,125.12 : x
  2. Step 2: Convert to fraction form
    3,172.72/4,377.01 = 2,125.12/x
  3. Step 3: Cross multiply
    3,172.72x = 4,377.01 × 2,125.12
  4. Step 4: Simplify right side
    3,172.72x = 9,301,671.49
  5. Step 5: Solve for x
    x = 9,301,671.49/3,172.72
  6. Step 6: Final answer
    x = 2,931.77

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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.