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Finding the Fourth Proportional to 19,205.90, 28,808.80 and 5,354.90

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Solution

The fourth proportional to 19,205.90, 28,808.80 and 5,354.90 is: 8,032.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,205.90 : 28,808.80 = 5,354.90 : x
  2. Step 2: Convert to fraction form
    19,205.90/28,808.80 = 5,354.90/x
  3. Step 3: Cross multiply
    19,205.90x = 28,808.80 × 5,354.90
  4. Step 4: Simplify right side
    19,205.90x = 154,268,243.12
  5. Step 5: Solve for x
    x = 154,268,243.12/19,205.90
  6. Step 6: Final answer
    x = 8,032.34

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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.