Home / 6,987.36-10,478.80-3,091.68

Finding the Fourth Proportional to 6,987.36, 10,478.80 and 3,091.68

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Solution

The fourth proportional to 6,987.36, 10,478.80 and 3,091.68 is: 4,636.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,987.36 : 10,478.80 = 3,091.68 : x
  2. Step 2: Convert to fraction form
    6,987.36/10,478.80 = 3,091.68/x
  3. Step 3: Cross multiply
    6,987.36x = 10,478.80 × 3,091.68
  4. Step 4: Simplify right side
    6,987.36x = 32,397,096.38
  5. Step 5: Solve for x
    x = 32,397,096.38/6,987.36
  6. Step 6: Final answer
    x = 4,636.53

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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.