Home / 3,420.09-4,720.14-2,859.57

Finding the Fourth Proportional to 3,420.09, 4,720.14 and 2,859.57

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Solution

The fourth proportional to 3,420.09, 4,720.14 and 2,859.57 is: 3,946.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,420.09 : 4,720.14 = 2,859.57 : x
  2. Step 2: Convert to fraction form
    3,420.09/4,720.14 = 2,859.57/x
  3. Step 3: Cross multiply
    3,420.09x = 4,720.14 × 2,859.57
  4. Step 4: Simplify right side
    3,420.09x = 13,497,570.74
  5. Step 5: Solve for x
    x = 13,497,570.74/3,420.09
  6. Step 6: Final answer
    x = 3,946.55

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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.