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Finding the Fourth Proportional to 19,800.78, 29,759.25 and 16,490.20

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Solution

The fourth proportional to 19,800.78, 29,759.25 and 16,490.20 is: 24,783.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,800.78 : 29,759.25 = 16,490.20 : x
  2. Step 2: Convert to fraction form
    19,800.78/29,759.25 = 16,490.20/x
  3. Step 3: Cross multiply
    19,800.78x = 29,759.25 × 16,490.20
  4. Step 4: Simplify right side
    19,800.78x = 490,735,984.35
  5. Step 5: Solve for x
    x = 490,735,984.35/19,800.78
  6. Step 6: Final answer
    x = 24,783.67

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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.