Home / 5,430.32-8,142.56-1,919.60

Finding the Fourth Proportional to 5,430.32, 8,142.56 and 1,919.60

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Solution

The fourth proportional to 5,430.32, 8,142.56 and 1,919.60 is: 2,878.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,430.32 : 8,142.56 = 1,919.60 : x
  2. Step 2: Convert to fraction form
    5,430.32/8,142.56 = 1,919.60/x
  3. Step 3: Cross multiply
    5,430.32x = 8,142.56 × 1,919.60
  4. Step 4: Simplify right side
    5,430.32x = 15,630,458.18
  5. Step 5: Solve for x
    x = 15,630,458.18/5,430.32
  6. Step 6: Final answer
    x = 2,878.37

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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.