Home / 20,786.48-28,686.12-11,355.11

Finding the Fourth Proportional to 20,786.48, 28,686.12 and 11,355.11

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Solution

The fourth proportional to 20,786.48, 28,686.12 and 11,355.11 is: 15,670.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,786.48 : 28,686.12 = 11,355.11 : x
  2. Step 2: Convert to fraction form
    20,786.48/28,686.12 = 11,355.11/x
  3. Step 3: Cross multiply
    20,786.48x = 28,686.12 × 11,355.11
  4. Step 4: Simplify right side
    20,786.48x = 325,734,048.07
  5. Step 5: Solve for x
    x = 325,734,048.07/20,786.48
  6. Step 6: Final answer
    x = 15,670.48

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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.