Home / 13,636.78-18,816.81-7,668.22

Finding the Fourth Proportional to 13,636.78, 18,816.81 and 7,668.22

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Solution

The fourth proportional to 13,636.78, 18,816.81 and 7,668.22 is: 10,581.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,636.78 : 18,816.81 = 7,668.22 : x
  2. Step 2: Convert to fraction form
    13,636.78/18,816.81 = 7,668.22/x
  3. Step 3: Cross multiply
    13,636.78x = 18,816.81 × 7,668.22
  4. Step 4: Simplify right side
    13,636.78x = 144,291,438.78
  5. Step 5: Solve for x
    x = 144,291,438.78/13,636.78
  6. Step 6: Final answer
    x = 10,581.05

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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.