Home / 20,959.55-28,923.75-11,399.63

Finding the Fourth Proportional to 20,959.55, 28,923.75 and 11,399.63

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Solution

The fourth proportional to 20,959.55, 28,923.75 and 11,399.63 is: 15,731.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,959.55 : 28,923.75 = 11,399.63 : x
  2. Step 2: Convert to fraction form
    20,959.55/28,923.75 = 11,399.63/x
  3. Step 3: Cross multiply
    20,959.55x = 28,923.75 × 11,399.63
  4. Step 4: Simplify right side
    20,959.55x = 329,719,846.60
  5. Step 5: Solve for x
    x = 329,719,846.60/20,959.55
  6. Step 6: Final answer
    x = 15,731.25

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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.