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Finding the Fourth Proportional to 6,880.70, 9,485.40 and 5,085.54

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Solution

The fourth proportional to 6,880.70, 9,485.40 and 5,085.54 is: 7,010.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,880.70 : 9,485.40 = 5,085.54 : x
  2. Step 2: Convert to fraction form
    6,880.70/9,485.40 = 5,085.54/x
  3. Step 3: Cross multiply
    6,880.70x = 9,485.40 × 5,085.54
  4. Step 4: Simplify right side
    6,880.70x = 48,238,381.12
  5. Step 5: Solve for x
    x = 48,238,381.12/6,880.70
  6. Step 6: Final answer
    x = 7,010.68

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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.