Home / 11,121.21-15,345.79-6,404.58

Finding the Fourth Proportional to 11,121.21, 15,345.79 and 6,404.58

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Solution

The fourth proportional to 11,121.21, 15,345.79 and 6,404.58 is: 8,837.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,121.21 : 15,345.79 = 6,404.58 : x
  2. Step 2: Convert to fraction form
    11,121.21/15,345.79 = 6,404.58/x
  3. Step 3: Cross multiply
    11,121.21x = 15,345.79 × 6,404.58
  4. Step 4: Simplify right side
    11,121.21x = 98,283,323.71
  5. Step 5: Solve for x
    x = 98,283,323.71/11,121.21
  6. Step 6: Final answer
    x = 8,837.47

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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.