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Finding the Fourth Proportional to 13,136.90, 19,688.90 and 6,564.92

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Solution

The fourth proportional to 13,136.90, 19,688.90 and 6,564.92 is: 9,839.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,136.90 : 19,688.90 = 6,564.92 : x
  2. Step 2: Convert to fraction form
    13,136.90/19,688.90 = 6,564.92/x
  3. Step 3: Cross multiply
    13,136.90x = 19,688.90 × 6,564.92
  4. Step 4: Simplify right side
    13,136.90x = 129,256,053.39
  5. Step 5: Solve for x
    x = 129,256,053.39/13,136.90
  6. Step 6: Final answer
    x = 9,839.16

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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.