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Finding the Fourth Proportional to 19,076.80, 28,615.20 and 18,752.80

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Solution

The fourth proportional to 19,076.80, 28,615.20 and 18,752.80 is: 28,129.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,076.80 : 28,615.20 = 18,752.80 : x
  2. Step 2: Convert to fraction form
    19,076.80/28,615.20 = 18,752.80/x
  3. Step 3: Cross multiply
    19,076.80x = 28,615.20 × 18,752.80
  4. Step 4: Simplify right side
    19,076.80x = 536,615,122.56
  5. Step 5: Solve for x
    x = 536,615,122.56/19,076.80
  6. Step 6: Final answer
    x = 28,129.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.