Home / 3,129.89-4,316.85-2,133.43

Finding the Fourth Proportional to 3,129.89, 4,316.85 and 2,133.43

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Solution

The fourth proportional to 3,129.89, 4,316.85 and 2,133.43 is: 2,942.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,129.89 : 4,316.85 = 2,133.43 : x
  2. Step 2: Convert to fraction form
    3,129.89/4,316.85 = 2,133.43/x
  3. Step 3: Cross multiply
    3,129.89x = 4,316.85 × 2,133.43
  4. Step 4: Simplify right side
    3,129.89x = 9,209,686.50
  5. Step 5: Solve for x
    x = 9,209,686.50/3,129.89
  6. Step 6: Final answer
    x = 2,942.50

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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.