Home / 13,136.79-19,720.78-10,365.45

Finding the Fourth Proportional to 13,136.79, 19,720.78 and 10,365.45

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Solution

The fourth proportional to 13,136.79, 19,720.78 and 10,365.45 is: 15,560.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,136.79 : 19,720.78 = 10,365.45 : x
  2. Step 2: Convert to fraction form
    13,136.79/19,720.78 = 10,365.45/x
  3. Step 3: Cross multiply
    13,136.79x = 19,720.78 × 10,365.45
  4. Step 4: Simplify right side
    13,136.79x = 204,414,688.34
  5. Step 5: Solve for x
    x = 204,414,688.34/13,136.79
  6. Step 6: Final answer
    x = 15,560.48

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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.