Home / 3,139.13-4,717.80-3,120.90

Finding the Fourth Proportional to 3,139.13, 4,717.80 and 3,120.90

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Solution

The fourth proportional to 3,139.13, 4,717.80 and 3,120.90 is: 4,690.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,139.13 : 4,717.80 = 3,120.90 : x
  2. Step 2: Convert to fraction form
    3,139.13/4,717.80 = 3,120.90/x
  3. Step 3: Cross multiply
    3,139.13x = 4,717.80 × 3,120.90
  4. Step 4: Simplify right side
    3,139.13x = 14,723,782.02
  5. Step 5: Solve for x
    x = 14,723,782.02/3,139.13
  6. Step 6: Final answer
    x = 4,690.40

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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.