Home / 3,139.92-4,686.94-2,911.50

Finding the Fourth Proportional to 3,139.92, 4,686.94 and 2,911.50

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Solution

The fourth proportional to 3,139.92, 4,686.94 and 2,911.50 is: 4,345.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,139.92 : 4,686.94 = 2,911.50 : x
  2. Step 2: Convert to fraction form
    3,139.92/4,686.94 = 2,911.50/x
  3. Step 3: Cross multiply
    3,139.92x = 4,686.94 × 2,911.50
  4. Step 4: Simplify right side
    3,139.92x = 13,646,025.81
  5. Step 5: Solve for x
    x = 13,646,025.81/3,139.92
  6. Step 6: Final answer
    x = 4,345.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.