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Finding the Fourth Proportional to 34,690.40, 52,042.80 and 11,318.60

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Solution

The fourth proportional to 34,690.40, 52,042.80 and 11,318.60 is: 16,980.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    34,690.40 : 52,042.80 = 11,318.60 : x
  2. Step 2: Convert to fraction form
    34,690.40/52,042.80 = 11,318.60/x
  3. Step 3: Cross multiply
    34,690.40x = 52,042.80 × 11,318.60
  4. Step 4: Simplify right side
    34,690.40x = 589,051,636.08
  5. Step 5: Solve for x
    x = 589,051,636.08/34,690.40
  6. Step 6: Final answer
    x = 16,980.25

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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.