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Finding the Fourth Proportional to 20,605.29, 30,907.86 and 7,454.53

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Solution

The fourth proportional to 20,605.29, 30,907.86 and 7,454.53 is: 11,181.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,605.29 : 30,907.86 = 7,454.53 : x
  2. Step 2: Convert to fraction form
    20,605.29/30,907.86 = 7,454.53/x
  3. Step 3: Cross multiply
    20,605.29x = 30,907.86 × 7,454.53
  4. Step 4: Simplify right side
    20,605.29x = 230,403,569.61
  5. Step 5: Solve for x
    x = 230,403,569.61/20,605.29
  6. Step 6: Final answer
    x = 11,181.77

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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.