Home / 2,156.09-2,975.09-1,211.72

Finding the Fourth Proportional to 2,156.09, 2,975.09 and 1,211.72

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Solution

The fourth proportional to 2,156.09, 2,975.09 and 1,211.72 is: 1,671.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,156.09 : 2,975.09 = 1,211.72 : x
  2. Step 2: Convert to fraction form
    2,156.09/2,975.09 = 1,211.72/x
  3. Step 3: Cross multiply
    2,156.09x = 2,975.09 × 1,211.72
  4. Step 4: Simplify right side
    2,156.09x = 3,604,955.12
  5. Step 5: Solve for x
    x = 3,604,955.12/2,156.09
  6. Step 6: Final answer
    x = 1,671.99

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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.