Home / 7,115.48-9,819.78-4,130.22

Finding the Fourth Proportional to 7,115.48, 9,819.78 and 4,130.22

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Solution

The fourth proportional to 7,115.48, 9,819.78 and 4,130.22 is: 5,699.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,115.48 : 9,819.78 = 4,130.22 : x
  2. Step 2: Convert to fraction form
    7,115.48/9,819.78 = 4,130.22/x
  3. Step 3: Cross multiply
    7,115.48x = 9,819.78 × 4,130.22
  4. Step 4: Simplify right side
    7,115.48x = 40,557,851.75
  5. Step 5: Solve for x
    x = 40,557,851.75/7,115.48
  6. Step 6: Final answer
    x = 5,699.95

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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.