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Finding the Fourth Proportional to 6,984.99, 9,638.20 and 4,151.31

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Solution

The fourth proportional to 6,984.99, 9,638.20 and 4,151.31 is: 5,728.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,984.99 : 9,638.20 = 4,151.31 : x
  2. Step 2: Convert to fraction form
    6,984.99/9,638.20 = 4,151.31/x
  3. Step 3: Cross multiply
    6,984.99x = 9,638.20 × 4,151.31
  4. Step 4: Simplify right side
    6,984.99x = 40,011,156.04
  5. Step 5: Solve for x
    x = 40,011,156.04/6,984.99
  6. Step 6: Final answer
    x = 5,728.16

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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.