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Finding the Fourth Proportional to 38,945.66, 53,745.03 and 21,040.65

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Solution

The fourth proportional to 38,945.66, 53,745.03 and 21,040.65 is: 29,036.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,945.66 : 53,745.03 = 21,040.65 : x
  2. Step 2: Convert to fraction form
    38,945.66/53,745.03 = 21,040.65/x
  3. Step 3: Cross multiply
    38,945.66x = 53,745.03 × 21,040.65
  4. Step 4: Simplify right side
    38,945.66x = 1,130,830,365.47
  5. Step 5: Solve for x
    x = 1,130,830,365.47/38,945.66
  6. Step 6: Final answer
    x = 29,036.11

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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.