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Finding the Fourth Proportional to 38,940.52, 53,737.89 and 21,035.53

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Solution

The fourth proportional to 38,940.52, 53,737.89 and 21,035.53 is: 29,029.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,940.52 : 53,737.89 = 21,035.53 : x
  2. Step 2: Convert to fraction form
    38,940.52/53,737.89 = 21,035.53/x
  3. Step 3: Cross multiply
    38,940.52x = 53,737.89 × 21,035.53
  4. Step 4: Simplify right side
    38,940.52x = 1,130,404,997.23
  5. Step 5: Solve for x
    x = 1,130,404,997.23/38,940.52
  6. Step 6: Final answer
    x = 29,029.02

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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.