Home / 15,919.21-21,968.71-8,749.91

Finding the Fourth Proportional to 15,919.21, 21,968.71 and 8,749.91

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Solution

The fourth proportional to 15,919.21, 21,968.71 and 8,749.91 is: 12,074.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,919.21 : 21,968.71 = 8,749.91 : x
  2. Step 2: Convert to fraction form
    15,919.21/21,968.71 = 8,749.91/x
  3. Step 3: Cross multiply
    15,919.21x = 21,968.71 × 8,749.91
  4. Step 4: Simplify right side
    15,919.21x = 192,224,081.72
  5. Step 5: Solve for x
    x = 192,224,081.72/15,919.21
  6. Step 6: Final answer
    x = 12,074.98

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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.