Home / 7,139.37-9,851.62-4,155.60

Finding the Fourth Proportional to 7,139.37, 9,851.62 and 4,155.60

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Solution

The fourth proportional to 7,139.37, 9,851.62 and 4,155.60 is: 5,734.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,139.37 : 9,851.62 = 4,155.60 : x
  2. Step 2: Convert to fraction form
    7,139.37/9,851.62 = 4,155.60/x
  3. Step 3: Cross multiply
    7,139.37x = 9,851.62 × 4,155.60
  4. Step 4: Simplify right side
    7,139.37x = 40,939,392.07
  5. Step 5: Solve for x
    x = 40,939,392.07/7,139.37
  6. Step 6: Final answer
    x = 5,734.31

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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.