Home / 3,514.40-4,849.72-1,921

Finding the Fourth Proportional to 3,514.40, 4,849.72 and 1,921

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Solution

The fourth proportional to 3,514.40, 4,849.72 and 1,921 is: 2,650.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,514.40 : 4,849.72 = 1,921 : x
  2. Step 2: Convert to fraction form
    3,514.40/4,849.72 = 1,921/x
  3. Step 3: Cross multiply
    3,514.40x = 4,849.72 × 1,921
  4. Step 4: Simplify right side
    3,514.40x = 9,316,312.12
  5. Step 5: Solve for x
    x = 9,316,312.12/3,514.40
  6. Step 6: Final answer
    x = 2,650.90

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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.