Home / 20,778.32-28,674.80-11,347.60

Finding the Fourth Proportional to 20,778.32, 28,674.80 and 11,347.60

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Solution

The fourth proportional to 20,778.32, 28,674.80 and 11,347.60 is: 15,660.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,778.32 : 28,674.80 = 11,347.60 : x
  2. Step 2: Convert to fraction form
    20,778.32/28,674.80 = 11,347.60/x
  3. Step 3: Cross multiply
    20,778.32x = 28,674.80 × 11,347.60
  4. Step 4: Simplify right side
    20,778.32x = 325,390,160.48
  5. Step 5: Solve for x
    x = 325,390,160.48/20,778.32
  6. Step 6: Final answer
    x = 15,660.08

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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.