Home / 5,172.96-7,143.60-5,162.40

Finding the Fourth Proportional to 5,172.96, 7,143.60 and 5,162.40

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Solution

The fourth proportional to 5,172.96, 7,143.60 and 5,162.40 is: 7,129.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,172.96 : 7,143.60 = 5,162.40 : x
  2. Step 2: Convert to fraction form
    5,172.96/7,143.60 = 5,162.40/x
  3. Step 3: Cross multiply
    5,172.96x = 7,143.60 × 5,162.40
  4. Step 4: Simplify right side
    5,172.96x = 36,878,120.64
  5. Step 5: Solve for x
    x = 36,878,120.64/5,172.96
  6. Step 6: Final answer
    x = 7,129.02

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.