Home / 30,840.96-42,518.19-19,504.80

Finding the Fourth Proportional to 30,840.96, 42,518.19 and 19,504.80

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Solution

The fourth proportional to 30,840.96, 42,518.19 and 19,504.80 is: 26,889.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,840.96 : 42,518.19 = 19,504.80 : x
  2. Step 2: Convert to fraction form
    30,840.96/42,518.19 = 19,504.80/x
  3. Step 3: Cross multiply
    30,840.96x = 42,518.19 × 19,504.80
  4. Step 4: Simplify right side
    30,840.96x = 829,308,792.31
  5. Step 5: Solve for x
    x = 829,308,792.31/30,840.96
  6. Step 6: Final answer
    x = 26,889.85

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Half scale
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Double scale
Find fourth proportional to 30,841.96, 42,519.57 and 19,505.80
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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.