Home / 7,131.21-10,697.58-1,866.30

Finding the Fourth Proportional to 7,131.21, 10,697.58 and 1,866.30

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Solution

The fourth proportional to 7,131.21, 10,697.58 and 1,866.30 is: 2,799.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,131.21 : 10,697.58 = 1,866.30 : x
  2. Step 2: Convert to fraction form
    7,131.21/10,697.58 = 1,866.30/x
  3. Step 3: Cross multiply
    7,131.21x = 10,697.58 × 1,866.30
  4. Step 4: Simplify right side
    7,131.21x = 19,964,893.55
  5. Step 5: Solve for x
    x = 19,964,893.55/7,131.21
  6. Step 6: Final answer
    x = 2,799.65

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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.