Home / 5,319.60-7,980.96-1,857.12

Finding the Fourth Proportional to 5,319.60, 7,980.96 and 1,857.12

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Solution

The fourth proportional to 5,319.60, 7,980.96 and 1,857.12 is: 2,786.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,319.60 : 7,980.96 = 1,857.12 : x
  2. Step 2: Convert to fraction form
    5,319.60/7,980.96 = 1,857.12/x
  3. Step 3: Cross multiply
    5,319.60x = 7,980.96 × 1,857.12
  4. Step 4: Simplify right side
    5,319.60x = 14,821,600.44
  5. Step 5: Solve for x
    x = 14,821,600.44/5,319.60
  6. Step 6: Final answer
    x = 2,786.22

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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.