Home / 19,180.80-26,438.40-18,921.60

Finding the Fourth Proportional to 19,180.80, 26,438.40 and 18,921.60

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Solution

The fourth proportional to 19,180.80, 26,438.40 and 18,921.60 is: 26,081.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,180.80 : 26,438.40 = 18,921.60 : x
  2. Step 2: Convert to fraction form
    19,180.80/26,438.40 = 18,921.60/x
  3. Step 3: Cross multiply
    19,180.80x = 26,438.40 × 18,921.60
  4. Step 4: Simplify right side
    19,180.80x = 500,256,829.44
  5. Step 5: Solve for x
    x = 500,256,829.44/19,180.80
  6. Step 6: Final answer
    x = 26,081.12

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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.