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Finding the Fourth Proportional to 19,257.60, 28,867.20 and 8,851.20

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Solution

The fourth proportional to 19,257.60, 28,867.20 and 8,851.20 is: 13,267.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,257.60 : 28,867.20 = 8,851.20 : x
  2. Step 2: Convert to fraction form
    19,257.60/28,867.20 = 8,851.20/x
  3. Step 3: Cross multiply
    19,257.60x = 28,867.20 × 8,851.20
  4. Step 4: Simplify right side
    19,257.60x = 255,509,360.64
  5. Step 5: Solve for x
    x = 255,509,360.64/19,257.60
  6. Step 6: Final answer
    x = 13,267.98

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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.