Home / 11,161.16-15,396.59-6,621.20

Finding the Fourth Proportional to 11,161.16, 15,396.59 and 6,621.20

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Solution

The fourth proportional to 11,161.16, 15,396.59 and 6,621.20 is: 9,133.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,161.16 : 15,396.59 = 6,621.20 : x
  2. Step 2: Convert to fraction form
    11,161.16/15,396.59 = 6,621.20/x
  3. Step 3: Cross multiply
    11,161.16x = 15,396.59 × 6,621.20
  4. Step 4: Simplify right side
    11,161.16x = 101,943,901.71
  5. Step 5: Solve for x
    x = 101,943,901.71/11,161.16
  6. Step 6: Final answer
    x = 9,133.81

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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.