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Finding the Fourth Proportional to 19,376.80, 28,978.80 and 16,266.40

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Solution

The fourth proportional to 19,376.80, 28,978.80 and 16,266.40 is: 24,327.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,376.80 : 28,978.80 = 16,266.40 : x
  2. Step 2: Convert to fraction form
    19,376.80/28,978.80 = 16,266.40/x
  3. Step 3: Cross multiply
    19,376.80x = 28,978.80 × 16,266.40
  4. Step 4: Simplify right side
    19,376.80x = 471,380,752.32
  5. Step 5: Solve for x
    x = 471,380,752.32/19,376.80
  6. Step 6: Final answer
    x = 24,327.07

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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.