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Finding the Fourth Proportional to 19,216.85, 28,839.85 and 13,290.08

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Solution

The fourth proportional to 19,216.85, 28,839.85 and 13,290.08 is: 19,945.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,216.85 : 28,839.85 = 13,290.08 : x
  2. Step 2: Convert to fraction form
    19,216.85/28,839.85 = 13,290.08/x
  3. Step 3: Cross multiply
    19,216.85x = 28,839.85 × 13,290.08
  4. Step 4: Simplify right side
    19,216.85x = 383,283,736.26
  5. Step 5: Solve for x
    x = 383,283,736.26/19,216.85
  6. Step 6: Final answer
    x = 19,945.20

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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.