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Finding the Fourth Proportional to 38,783.66, 53,518.29 and 21,786.98

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Solution

The fourth proportional to 38,783.66, 53,518.29 and 21,786.98 is: 30,064.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,783.66 : 53,518.29 = 21,786.98 : x
  2. Step 2: Convert to fraction form
    38,783.66/53,518.29 = 21,786.98/x
  3. Step 3: Cross multiply
    38,783.66x = 53,518.29 × 21,786.98
  4. Step 4: Simplify right side
    38,783.66x = 1,166,001,646.27
  5. Step 5: Solve for x
    x = 1,166,001,646.27/38,783.66
  6. Step 6: Final answer
    x = 30,064.25

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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.