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Finding the Fourth Proportional to 9,135.03, 12,605 and 5,356.77

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Solution

The fourth proportional to 9,135.03, 12,605 and 5,356.77 is: 7,391.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,135.03 : 12,605 = 5,356.77 : x
  2. Step 2: Convert to fraction form
    9,135.03/12,605 = 5,356.77/x
  3. Step 3: Cross multiply
    9,135.03x = 12,605 × 5,356.77
  4. Step 4: Simplify right side
    9,135.03x = 67,522,085.85
  5. Step 5: Solve for x
    x = 67,522,085.85/9,135.03
  6. Step 6: Final answer
    x = 7,391.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.