Home / 7,131.12-9,843.68-4,772.40

Finding the Fourth Proportional to 7,131.12, 9,843.68 and 4,772.40

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Solution

The fourth proportional to 7,131.12, 9,843.68 and 4,772.40 is: 6,587.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,131.12 : 9,843.68 = 4,772.40 : x
  2. Step 2: Convert to fraction form
    7,131.12/9,843.68 = 4,772.40/x
  3. Step 3: Cross multiply
    7,131.12x = 9,843.68 × 4,772.40
  4. Step 4: Simplify right side
    7,131.12x = 46,977,978.43
  5. Step 5: Solve for x
    x = 46,977,978.43/7,131.12
  6. Step 6: Final answer
    x = 6,587.74

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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.