Home / 7,130.57-9,840.71-3,986.56

Finding the Fourth Proportional to 7,130.57, 9,840.71 and 3,986.56

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Solution

The fourth proportional to 7,130.57, 9,840.71 and 3,986.56 is: 5,501.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,130.57 : 9,840.71 = 3,986.56 : x
  2. Step 2: Convert to fraction form
    7,130.57/9,840.71 = 3,986.56/x
  3. Step 3: Cross multiply
    7,130.57x = 9,840.71 × 3,986.56
  4. Step 4: Simplify right side
    7,130.57x = 39,230,511.72
  5. Step 5: Solve for x
    x = 39,230,511.72/7,130.57
  6. Step 6: Final answer
    x = 5,501.74

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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.