Home / 3,420.16-5,130.20-1,111.66

Finding the Fourth Proportional to 3,420.16, 5,130.20 and 1,111.66

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Solution

The fourth proportional to 3,420.16, 5,130.20 and 1,111.66 is: 1,667.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,420.16 : 5,130.20 = 1,111.66 : x
  2. Step 2: Convert to fraction form
    3,420.16/5,130.20 = 1,111.66/x
  3. Step 3: Cross multiply
    3,420.16x = 5,130.20 × 1,111.66
  4. Step 4: Simplify right side
    3,420.16x = 5,703,028.09
  5. Step 5: Solve for x
    x = 5,703,028.09/3,420.16
  6. Step 6: Final answer
    x = 1,667.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.