Home / 15,391.74-21,239.32-8,679.02

Finding the Fourth Proportional to 15,391.74, 21,239.32 and 8,679.02

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Solution

The fourth proportional to 15,391.74, 21,239.32 and 8,679.02 is: 11,976.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,391.74 : 21,239.32 = 8,679.02 : x
  2. Step 2: Convert to fraction form
    15,391.74/21,239.32 = 8,679.02/x
  3. Step 3: Cross multiply
    15,391.74x = 21,239.32 × 8,679.02
  4. Step 4: Simplify right side
    15,391.74x = 184,336,483.07
  5. Step 5: Solve for x
    x = 184,336,483.07/15,391.74
  6. Step 6: Final answer
    x = 11,976.33

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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.