Home / 20,581.03-28,401.78-11,149.62

Finding the Fourth Proportional to 20,581.03, 28,401.78 and 11,149.62

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Solution

The fourth proportional to 20,581.03, 28,401.78 and 11,149.62 is: 15,386.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,581.03 : 28,401.78 = 11,149.62 : x
  2. Step 2: Convert to fraction form
    20,581.03/28,401.78 = 11,149.62/x
  3. Step 3: Cross multiply
    20,581.03x = 28,401.78 × 11,149.62
  4. Step 4: Simplify right side
    20,581.03x = 316,669,054.32
  5. Step 5: Solve for x
    x = 316,669,054.32/20,581.03
  6. Step 6: Final answer
    x = 15,386.45

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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.