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Finding the Fourth Proportional to 28,679.70, 42,964.88 and 16,804.29

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Solution

The fourth proportional to 28,679.70, 42,964.88 and 16,804.29 is: 25,174.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,679.70 : 42,964.88 = 16,804.29 : x
  2. Step 2: Convert to fraction form
    28,679.70/42,964.88 = 16,804.29/x
  3. Step 3: Cross multiply
    28,679.70x = 42,964.88 × 16,804.29
  4. Step 4: Simplify right side
    28,679.70x = 721,994,219.31
  5. Step 5: Solve for x
    x = 721,994,219.31/28,679.70
  6. Step 6: Final answer
    x = 25,174.40

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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.