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Finding the Fourth Proportional to 19,216.90, 28,809.35 and 8,132.10

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Solution

The fourth proportional to 19,216.90, 28,809.35 and 8,132.10 is: 12,191.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,216.90 : 28,809.35 = 8,132.10 : x
  2. Step 2: Convert to fraction form
    19,216.90/28,809.35 = 8,132.10/x
  3. Step 3: Cross multiply
    19,216.90x = 28,809.35 × 8,132.10
  4. Step 4: Simplify right side
    19,216.90x = 234,280,515.14
  5. Step 5: Solve for x
    x = 234,280,515.14/19,216.90
  6. Step 6: Final answer
    x = 12,191.38

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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.