Home / 5,431.90-8,150.55-2,145.10

Finding the Fourth Proportional to 5,431.90, 8,150.55 and 2,145.10

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Solution

The fourth proportional to 5,431.90, 8,150.55 and 2,145.10 is: 3,218.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,431.90 : 8,150.55 = 2,145.10 : x
  2. Step 2: Convert to fraction form
    5,431.90/8,150.55 = 2,145.10/x
  3. Step 3: Cross multiply
    5,431.90x = 8,150.55 × 2,145.10
  4. Step 4: Simplify right side
    5,431.90x = 17,483,744.81
  5. Step 5: Solve for x
    x = 17,483,744.81/5,431.90
  6. Step 6: Final answer
    x = 3,218.72

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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.