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Finding the Fourth Proportional to 7,415.13, 11,122.70 and 2,221

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Solution

The fourth proportional to 7,415.13, 11,122.70 and 2,221 is: 3,331.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,415.13 : 11,122.70 = 2,221 : x
  2. Step 2: Convert to fraction form
    7,415.13/11,122.70 = 2,221/x
  3. Step 3: Cross multiply
    7,415.13x = 11,122.70 × 2,221
  4. Step 4: Simplify right side
    7,415.13x = 24,703,516.70
  5. Step 5: Solve for x
    x = 24,703,516.70/7,415.13
  6. Step 6: Final answer
    x = 3,331.50

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Half scale
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Double scale
Find fourth proportional to 7,416.13, 11,124.20 and 2,222
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.