Home / 9,990.03-13,772.91-7,161.51

Finding the Fourth Proportional to 9,990.03, 13,772.91 and 7,161.51

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Solution

The fourth proportional to 9,990.03, 13,772.91 and 7,161.51 is: 9,873.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,990.03 : 13,772.91 = 7,161.51 : x
  2. Step 2: Convert to fraction form
    9,990.03/13,772.91 = 7,161.51/x
  3. Step 3: Cross multiply
    9,990.03x = 13,772.91 × 7,161.51
  4. Step 4: Simplify right side
    9,990.03x = 98,634,832.69
  5. Step 5: Solve for x
    x = 98,634,832.69/9,990.03
  6. Step 6: Final answer
    x = 9,873.33

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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.