Home / 21,621.69-29,838.24-12,190.23

Finding the Fourth Proportional to 21,621.69, 29,838.24 and 12,190.23

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Solution

The fourth proportional to 21,621.69, 29,838.24 and 12,190.23 is: 16,822.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,621.69 : 29,838.24 = 12,190.23 : x
  2. Step 2: Convert to fraction form
    21,621.69/29,838.24 = 12,190.23/x
  3. Step 3: Cross multiply
    21,621.69x = 29,838.24 × 12,190.23
  4. Step 4: Simplify right side
    21,621.69x = 363,735,008.40
  5. Step 5: Solve for x
    x = 363,735,008.40/21,621.69
  6. Step 6: Final answer
    x = 16,822.69

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Half scale
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Double scale
Find fourth proportional to 21,622.69, 29,839.62 and 12,191.23
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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.