Home / 30,821.78-42,534.41-17,393.19

Finding the Fourth Proportional to 30,821.78, 42,534.41 and 17,393.19

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Solution

The fourth proportional to 30,821.78, 42,534.41 and 17,393.19 is: 24,002.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,821.78 : 42,534.41 = 17,393.19 : x
  2. Step 2: Convert to fraction form
    30,821.78/42,534.41 = 17,393.19/x
  3. Step 3: Cross multiply
    30,821.78x = 42,534.41 × 17,393.19
  4. Step 4: Simplify right side
    30,821.78x = 739,809,074.67
  5. Step 5: Solve for x
    x = 739,809,074.67/30,821.78
  6. Step 6: Final answer
    x = 24,002.80

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Double scale
Find fourth proportional to 30,822.78, 42,535.79 and 17,394.19
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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.