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Finding the Fourth Proportional to 35,669.60, 53,491.80 and 12,290.60

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Solution

The fourth proportional to 35,669.60, 53,491.80 and 12,290.60 is: 18,431.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,669.60 : 53,491.80 = 12,290.60 : x
  2. Step 2: Convert to fraction form
    35,669.60/53,491.80 = 12,290.60/x
  3. Step 3: Cross multiply
    35,669.60x = 53,491.80 × 12,290.60
  4. Step 4: Simplify right side
    35,669.60x = 657,446,317.08
  5. Step 5: Solve for x
    x = 657,446,317.08/35,669.60
  6. Step 6: Final answer
    x = 18,431.56

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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.