Home / 2,167.16-2,989.88-1,421.54

Finding the Fourth Proportional to 2,167.16, 2,989.88 and 1,421.54

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Solution

The fourth proportional to 2,167.16, 2,989.88 and 1,421.54 is: 1,961.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,167.16 : 2,989.88 = 1,421.54 : x
  2. Step 2: Convert to fraction form
    2,167.16/2,989.88 = 1,421.54/x
  3. Step 3: Cross multiply
    2,167.16x = 2,989.88 × 1,421.54
  4. Step 4: Simplify right side
    2,167.16x = 4,250,222.62
  5. Step 5: Solve for x
    x = 4,250,222.62/2,167.16
  6. Step 6: Final answer
    x = 1,961.19

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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.