Home / 38,638.72-53,320.08-21,871.36

Finding the Fourth Proportional to 38,638.72, 53,320.08 and 21,871.36

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Solution

The fourth proportional to 38,638.72, 53,320.08 and 21,871.36 is: 30,181.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,638.72 : 53,320.08 = 21,871.36 : x
  2. Step 2: Convert to fraction form
    38,638.72/53,320.08 = 21,871.36/x
  3. Step 3: Cross multiply
    38,638.72x = 53,320.08 × 21,871.36
  4. Step 4: Simplify right side
    38,638.72x = 1,166,182,664.91
  5. Step 5: Solve for x
    x = 1,166,182,664.91/38,638.72
  6. Step 6: Final answer
    x = 30,181.71

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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.