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Finding the Fourth Proportional to 38,485.71, 53,097.80 and 21,487.19

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Solution

The fourth proportional to 38,485.71, 53,097.80 and 21,487.19 is: 29,645.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,485.71 : 53,097.80 = 21,487.19 : x
  2. Step 2: Convert to fraction form
    38,485.71/53,097.80 = 21,487.19/x
  3. Step 3: Cross multiply
    38,485.71x = 53,097.80 × 21,487.19
  4. Step 4: Simplify right side
    38,485.71x = 1,140,922,144.26
  5. Step 5: Solve for x
    x = 1,140,922,144.26/38,485.71
  6. Step 6: Final answer
    x = 29,645.34

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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.