Home / 20,627.09-30,918.91-13,136.34

Finding the Fourth Proportional to 20,627.09, 30,918.91 and 13,136.34

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Solution

The fourth proportional to 20,627.09, 30,918.91 and 13,136.34 is: 19,690.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,627.09 : 30,918.91 = 13,136.34 : x
  2. Step 2: Convert to fraction form
    20,627.09/30,918.91 = 13,136.34/x
  3. Step 3: Cross multiply
    20,627.09x = 30,918.91 × 13,136.34
  4. Step 4: Simplify right side
    20,627.09x = 406,161,314.19
  5. Step 5: Solve for x
    x = 406,161,314.19/20,627.09
  6. Step 6: Final answer
    x = 19,690.67

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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.