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Finding the Fourth Proportional to 19,992.60, 28,018.80 and 19,992.60

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Solution

The fourth proportional to 19,992.60, 28,018.80 and 19,992.60 is: 28,018.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,992.60 : 28,018.80 = 19,992.60 : x
  2. Step 2: Convert to fraction form
    19,992.60/28,018.80 = 19,992.60/x
  3. Step 3: Cross multiply
    19,992.60x = 28,018.80 × 19,992.60
  4. Step 4: Simplify right side
    19,992.60x = 560,168,660.88
  5. Step 5: Solve for x
    x = 560,168,660.88/19,992.60
  6. Step 6: Final answer
    x = 28,018.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.