Home / 20,509.15-28,303.22-11,556.16

Finding the Fourth Proportional to 20,509.15, 28,303.22 and 11,556.16

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Solution

The fourth proportional to 20,509.15, 28,303.22 and 11,556.16 is: 15,947.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,509.15 : 28,303.22 = 11,556.16 : x
  2. Step 2: Convert to fraction form
    20,509.15/28,303.22 = 11,556.16/x
  3. Step 3: Cross multiply
    20,509.15x = 28,303.22 × 11,556.16
  4. Step 4: Simplify right side
    20,509.15x = 327,076,538.84
  5. Step 5: Solve for x
    x = 327,076,538.84/20,509.15
  6. Step 6: Final answer
    x = 15,947.83

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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.