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Finding the Fourth Proportional to 19,180.80, 26,308.80 and 18,403.20

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Solution

The fourth proportional to 19,180.80, 26,308.80 and 18,403.20 is: 25,242.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,180.80 : 26,308.80 = 18,403.20 : x
  2. Step 2: Convert to fraction form
    19,180.80/26,308.80 = 18,403.20/x
  3. Step 3: Cross multiply
    19,180.80x = 26,308.80 × 18,403.20
  4. Step 4: Simplify right side
    19,180.80x = 484,166,108.16
  5. Step 5: Solve for x
    x = 484,166,108.16/19,180.80
  6. Step 6: Final answer
    x = 25,242.23

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.