Home / 3,139.20-4,686.08-2,911.19

Finding the Fourth Proportional to 3,139.20, 4,686.08 and 2,911.19

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Solution

The fourth proportional to 3,139.20, 4,686.08 and 2,911.19 is: 4,345.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,139.20 : 4,686.08 = 2,911.19 : x
  2. Step 2: Convert to fraction form
    3,139.20/4,686.08 = 2,911.19/x
  3. Step 3: Cross multiply
    3,139.20x = 4,686.08 × 2,911.19
  4. Step 4: Simplify right side
    3,139.20x = 13,642,031.25
  5. Step 5: Solve for x
    x = 13,642,031.25/3,139.20
  6. Step 6: Final answer
    x = 4,345.70

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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.