Home / 20,778.24-28,674.36-11,347.20

Finding the Fourth Proportional to 20,778.24, 28,674.36 and 11,347.20

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Solution

The fourth proportional to 20,778.24, 28,674.36 and 11,347.20 is: 15,659.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,778.24 : 28,674.36 = 11,347.20 : x
  2. Step 2: Convert to fraction form
    20,778.24/28,674.36 = 11,347.20/x
  3. Step 3: Cross multiply
    20,778.24x = 28,674.36 × 11,347.20
  4. Step 4: Simplify right side
    20,778.24x = 325,373,697.79
  5. Step 5: Solve for x
    x = 325,373,697.79/20,778.24
  6. Step 6: Final answer
    x = 15,659.35

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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.