Home / 2,782.15-4,189.73-2,421.29

Finding the Fourth Proportional to 2,782.15, 4,189.73 and 2,421.29

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Solution

The fourth proportional to 2,782.15, 4,189.73 and 2,421.29 is: 3,646.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,782.15 : 4,189.73 = 2,421.29 : x
  2. Step 2: Convert to fraction form
    2,782.15/4,189.73 = 2,421.29/x
  3. Step 3: Cross multiply
    2,782.15x = 4,189.73 × 2,421.29
  4. Step 4: Simplify right side
    2,782.15x = 10,144,549.72
  5. Step 5: Solve for x
    x = 10,144,549.72/2,782.15
  6. Step 6: Final answer
    x = 3,646.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.