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Finding the Fourth Proportional to 17,136.80, 25,681.20 and 13,632.80

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Solution

The fourth proportional to 17,136.80, 25,681.20 and 13,632.80 is: 20,430.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,136.80 : 25,681.20 = 13,632.80 : x
  2. Step 2: Convert to fraction form
    17,136.80/25,681.20 = 13,632.80/x
  3. Step 3: Cross multiply
    17,136.80x = 25,681.20 × 13,632.80
  4. Step 4: Simplify right side
    17,136.80x = 350,106,663.36
  5. Step 5: Solve for x
    x = 350,106,663.36/17,136.80
  6. Step 6: Final answer
    x = 20,430.11

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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.