Home / 7,781.40-10,739.37-4,949.05

Finding the Fourth Proportional to 7,781.40, 10,739.37 and 4,949.05

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Solution

The fourth proportional to 7,781.40, 10,739.37 and 4,949.05 is: 6,830.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,781.40 : 10,739.37 = 4,949.05 : x
  2. Step 2: Convert to fraction form
    7,781.40/10,739.37 = 4,949.05/x
  3. Step 3: Cross multiply
    7,781.40x = 10,739.37 × 4,949.05
  4. Step 4: Simplify right side
    7,781.40x = 53,149,679.10
  5. Step 5: Solve for x
    x = 53,149,679.10/7,781.40
  6. Step 6: Final answer
    x = 6,830.35

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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.