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Finding the Fourth Proportional to 38,897.68, 53,683.92 and 21,905.25

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Solution

The fourth proportional to 38,897.68, 53,683.92 and 21,905.25 is: 30,232.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,897.68 : 53,683.92 = 21,905.25 : x
  2. Step 2: Convert to fraction form
    38,897.68/53,683.92 = 21,905.25/x
  3. Step 3: Cross multiply
    38,897.68x = 53,683.92 × 21,905.25
  4. Step 4: Simplify right side
    38,897.68x = 1,175,959,688.58
  5. Step 5: Solve for x
    x = 1,175,959,688.58/38,897.68
  6. Step 6: Final answer
    x = 30,232.13

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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.