Home / 15,297.08-21,106.38-8,919.86

Finding the Fourth Proportional to 15,297.08, 21,106.38 and 8,919.86

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Solution

The fourth proportional to 15,297.08, 21,106.38 and 8,919.86 is: 12,307.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,297.08 : 21,106.38 = 8,919.86 : x
  2. Step 2: Convert to fraction form
    15,297.08/21,106.38 = 8,919.86/x
  3. Step 3: Cross multiply
    15,297.08x = 21,106.38 × 8,919.86
  4. Step 4: Simplify right side
    15,297.08x = 188,265,954.71
  5. Step 5: Solve for x
    x = 188,265,954.71/15,297.08
  6. Step 6: Final answer
    x = 12,307.31

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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.