Home / 7,077.53-9,766.40-3,890.66

Finding the Fourth Proportional to 7,077.53, 9,766.40 and 3,890.66

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Solution

The fourth proportional to 7,077.53, 9,766.40 and 3,890.66 is: 5,368.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,077.53 : 9,766.40 = 3,890.66 : x
  2. Step 2: Convert to fraction form
    7,077.53/9,766.40 = 3,890.66/x
  3. Step 3: Cross multiply
    7,077.53x = 9,766.40 × 3,890.66
  4. Step 4: Simplify right side
    7,077.53x = 37,997,673.54
  5. Step 5: Solve for x
    x = 37,997,673.54/7,077.53
  6. Step 6: Final answer
    x = 5,368.77

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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.