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Finding the Fourth Proportional to 6,970.84, 9,615.38 and 4,136.21

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Solution

The fourth proportional to 6,970.84, 9,615.38 and 4,136.21 is: 5,705.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,970.84 : 9,615.38 = 4,136.21 : x
  2. Step 2: Convert to fraction form
    6,970.84/9,615.38 = 4,136.21/x
  3. Step 3: Cross multiply
    6,970.84x = 9,615.38 × 4,136.21
  4. Step 4: Simplify right side
    6,970.84x = 39,771,230.91
  5. Step 5: Solve for x
    x = 39,771,230.91/6,970.84
  6. Step 6: Final answer
    x = 5,705.37

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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.