Home / 3,129.81-4,309.29-2,656.72

Finding the Fourth Proportional to 3,129.81, 4,309.29 and 2,656.72

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Solution

The fourth proportional to 3,129.81, 4,309.29 and 2,656.72 is: 3,657.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,129.81 : 4,309.29 = 2,656.72 : x
  2. Step 2: Convert to fraction form
    3,129.81/4,309.29 = 2,656.72/x
  3. Step 3: Cross multiply
    3,129.81x = 4,309.29 × 2,656.72
  4. Step 4: Simplify right side
    3,129.81x = 11,448,555.38
  5. Step 5: Solve for x
    x = 11,448,555.38/3,129.81
  6. Step 6: Final answer
    x = 3,657.91

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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.