Home / 7,120.04-9,829.86-5,135.72

Finding the Fourth Proportional to 7,120.04, 9,829.86 and 5,135.72

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Solution

The fourth proportional to 7,120.04, 9,829.86 and 5,135.72 is: 7,090.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,120.04 : 9,829.86 = 5,135.72 : x
  2. Step 2: Convert to fraction form
    7,120.04/9,829.86 = 5,135.72/x
  3. Step 3: Cross multiply
    7,120.04x = 9,829.86 × 5,135.72
  4. Step 4: Simplify right side
    7,120.04x = 50,483,408.60
  5. Step 5: Solve for x
    x = 50,483,408.60/7,120.04
  6. Step 6: Final answer
    x = 7,090.33

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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.