Home / 7,172.64-10,758.96-1,978.56

Finding the Fourth Proportional to 7,172.64, 10,758.96 and 1,978.56

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Solution

The fourth proportional to 7,172.64, 10,758.96 and 1,978.56 is: 2,967.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,172.64 : 10,758.96 = 1,978.56 : x
  2. Step 2: Convert to fraction form
    7,172.64/10,758.96 = 1,978.56/x
  3. Step 3: Cross multiply
    7,172.64x = 10,758.96 × 1,978.56
  4. Step 4: Simplify right side
    7,172.64x = 21,287,247.90
  5. Step 5: Solve for x
    x = 21,287,247.90/7,172.64
  6. Step 6: Final answer
    x = 2,967.84

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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.