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Finding the Fourth Proportional to 35,958.40, 53,969.60 and 21,148.80

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Solution

The fourth proportional to 35,958.40, 53,969.60 and 21,148.80 is: 31,742.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,958.40 : 53,969.60 = 21,148.80 : x
  2. Step 2: Convert to fraction form
    35,958.40/53,969.60 = 21,148.80/x
  3. Step 3: Cross multiply
    35,958.40x = 53,969.60 × 21,148.80
  4. Step 4: Simplify right side
    35,958.40x = 1,141,392,276.48
  5. Step 5: Solve for x
    x = 1,141,392,276.48/35,958.40
  6. Step 6: Final answer
    x = 31,742.02

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.