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Finding the Fourth Proportional to 38,885.96, 53,662.01 and 21,890.16

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Solution

The fourth proportional to 38,885.96, 53,662.01 and 21,890.16 is: 30,208.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,885.96 : 53,662.01 = 21,890.16 : x
  2. Step 2: Convert to fraction form
    38,885.96/53,662.01 = 21,890.16/x
  3. Step 3: Cross multiply
    38,885.96x = 53,662.01 × 21,890.16
  4. Step 4: Simplify right side
    38,885.96x = 1,174,669,875.37
  5. Step 5: Solve for x
    x = 1,174,669,875.37/38,885.96
  6. Step 6: Final answer
    x = 30,208.08

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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.