Home / 12,698.75-17,520.21-8,225.93

Finding the Fourth Proportional to 12,698.75, 17,520.21 and 8,225.93

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Solution

The fourth proportional to 12,698.75, 17,520.21 and 8,225.93 is: 11,349.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,698.75 : 17,520.21 = 8,225.93 : x
  2. Step 2: Convert to fraction form
    12,698.75/17,520.21 = 8,225.93/x
  3. Step 3: Cross multiply
    12,698.75x = 17,520.21 × 8,225.93
  4. Step 4: Simplify right side
    12,698.75x = 144,120,021.05
  5. Step 5: Solve for x
    x = 144,120,021.05/12,698.75
  6. Step 6: Final answer
    x = 11,349.15

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Half scale
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Double scale
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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.