Home / 7,107.78-9,812.88-4,720.98

Finding the Fourth Proportional to 7,107.78, 9,812.88 and 4,720.98

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Solution

The fourth proportional to 7,107.78, 9,812.88 and 4,720.98 is: 6,517.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,107.78 : 9,812.88 = 4,720.98 : x
  2. Step 2: Convert to fraction form
    7,107.78/9,812.88 = 4,720.98/x
  3. Step 3: Cross multiply
    7,107.78x = 9,812.88 × 4,720.98
  4. Step 4: Simplify right side
    7,107.78x = 46,326,410.22
  5. Step 5: Solve for x
    x = 46,326,410.22/7,107.78
  6. Step 6: Final answer
    x = 6,517.70

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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.