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Finding the Fourth Proportional to 6,707.81, 9,256.78 and 3,913.31

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Solution

The fourth proportional to 6,707.81, 9,256.78 and 3,913.31 is: 5,400.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,707.81 : 9,256.78 = 3,913.31 : x
  2. Step 2: Convert to fraction form
    6,707.81/9,256.78 = 3,913.31/x
  3. Step 3: Cross multiply
    6,707.81x = 9,256.78 × 3,913.31
  4. Step 4: Simplify right side
    6,707.81x = 36,224,677.78
  5. Step 5: Solve for x
    x = 36,224,677.78/6,707.81
  6. Step 6: Final answer
    x = 5,400.37

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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.