Home / 20,485.97-28,271.16-11,533.79

Finding the Fourth Proportional to 20,485.97, 28,271.16 and 11,533.79

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Solution

The fourth proportional to 20,485.97, 28,271.16 and 11,533.79 is: 15,916.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,485.97 : 28,271.16 = 11,533.79 : x
  2. Step 2: Convert to fraction form
    20,485.97/28,271.16 = 11,533.79/x
  3. Step 3: Cross multiply
    20,485.97x = 28,271.16 × 11,533.79
  4. Step 4: Simplify right side
    20,485.97x = 326,073,481.14
  5. Step 5: Solve for x
    x = 326,073,481.14/20,485.97
  6. Step 6: Final answer
    x = 15,916.92

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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.