Home / 5,138.38-7,670.40-4,515.60

Finding the Fourth Proportional to 5,138.38, 7,670.40 and 4,515.60

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Solution

The fourth proportional to 5,138.38, 7,670.40 and 4,515.60 is: 6,740.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,138.38 : 7,670.40 = 4,515.60 : x
  2. Step 2: Convert to fraction form
    5,138.38/7,670.40 = 4,515.60/x
  3. Step 3: Cross multiply
    5,138.38x = 7,670.40 × 4,515.60
  4. Step 4: Simplify right side
    5,138.38x = 34,636,458.24
  5. Step 5: Solve for x
    x = 34,636,458.24/5,138.38
  6. Step 6: Final answer
    x = 6,740.74

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.