Home / 5,431.60-8,145.20-1,968.08

Finding the Fourth Proportional to 5,431.60, 8,145.20 and 1,968.08

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Solution

The fourth proportional to 5,431.60, 8,145.20 and 1,968.08 is: 2,951.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,431.60 : 8,145.20 = 1,968.08 : x
  2. Step 2: Convert to fraction form
    5,431.60/8,145.20 = 1,968.08/x
  3. Step 3: Cross multiply
    5,431.60x = 8,145.20 × 1,968.08
  4. Step 4: Simplify right side
    5,431.60x = 16,030,405.22
  5. Step 5: Solve for x
    x = 16,030,405.22/5,431.60
  6. Step 6: Final answer
    x = 2,951.32

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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.