Home / 10,138.07-13,990.55-5,661.82

Finding the Fourth Proportional to 10,138.07, 13,990.55 and 5,661.82

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Solution

The fourth proportional to 10,138.07, 13,990.55 and 5,661.82 is: 7,813.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,138.07 : 13,990.55 = 5,661.82 : x
  2. Step 2: Convert to fraction form
    10,138.07/13,990.55 = 5,661.82/x
  3. Step 3: Cross multiply
    10,138.07x = 13,990.55 × 5,661.82
  4. Step 4: Simplify right side
    10,138.07x = 79,211,975.80
  5. Step 5: Solve for x
    x = 79,211,975.80/10,138.07
  6. Step 6: Final answer
    x = 7,813.32

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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.