Home / 20,478.27-28,260.04-11,525.84

Finding the Fourth Proportional to 20,478.27, 28,260.04 and 11,525.84

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Solution

The fourth proportional to 20,478.27, 28,260.04 and 11,525.84 is: 15,905.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,478.27 : 28,260.04 = 11,525.84 : x
  2. Step 2: Convert to fraction form
    20,478.27/28,260.04 = 11,525.84/x
  3. Step 3: Cross multiply
    20,478.27x = 28,260.04 × 11,525.84
  4. Step 4: Simplify right side
    20,478.27x = 325,720,815.87
  5. Step 5: Solve for x
    x = 325,720,815.87/20,478.27
  6. Step 6: Final answer
    x = 15,905.68

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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.