Home / 38,121.50-52,609.70-21,127.60

Finding the Fourth Proportional to 38,121.50, 52,609.70 and 21,127.60

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Solution

The fourth proportional to 38,121.50, 52,609.70 and 21,127.60 is: 29,157.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,121.50 : 52,609.70 = 21,127.60 : x
  2. Step 2: Convert to fraction form
    38,121.50/52,609.70 = 21,127.60/x
  3. Step 3: Cross multiply
    38,121.50x = 52,609.70 × 21,127.60
  4. Step 4: Simplify right side
    38,121.50x = 1,111,516,460.56
  5. Step 5: Solve for x
    x = 1,111,516,460.56/38,121.50
  6. Step 6: Final answer
    x = 29,157.20

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Half scale
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Double scale
Find fourth proportional to 38,122.50, 52,611.08 and 21,128.60
Similar ratio
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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.