Home / 7,112.61-9,815.49-4,129.32

Finding the Fourth Proportional to 7,112.61, 9,815.49 and 4,129.32

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Solution

The fourth proportional to 7,112.61, 9,815.49 and 4,129.32 is: 5,698.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,112.61 : 9,815.49 = 4,129.32 : x
  2. Step 2: Convert to fraction form
    7,112.61/9,815.49 = 4,129.32/x
  3. Step 3: Cross multiply
    7,112.61x = 9,815.49 × 4,129.32
  4. Step 4: Simplify right side
    7,112.61x = 40,531,299.17
  5. Step 5: Solve for x
    x = 40,531,299.17/7,112.61
  6. Step 6: Final answer
    x = 5,698.51

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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.