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Finding the Fourth Proportional to 19,219.60, 28,764.60 and 16,886.80

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Solution

The fourth proportional to 19,219.60, 28,764.60 and 16,886.80 is: 25,273.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,219.60 : 28,764.60 = 16,886.80 : x
  2. Step 2: Convert to fraction form
    19,219.60/28,764.60 = 16,886.80/x
  3. Step 3: Cross multiply
    19,219.60x = 28,764.60 × 16,886.80
  4. Step 4: Simplify right side
    19,219.60x = 485,742,047.28
  5. Step 5: Solve for x
    x = 485,742,047.28/19,219.60
  6. Step 6: Final answer
    x = 25,273.27

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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.