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Finding the Fourth Proportional to 35,540.40, 53,317.80 and 12,169.20

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Solution

The fourth proportional to 35,540.40, 53,317.80 and 12,169.20 is: 18,256.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,540.40 : 53,317.80 = 12,169.20 : x
  2. Step 2: Convert to fraction form
    35,540.40/53,317.80 = 12,169.20/x
  3. Step 3: Cross multiply
    35,540.40x = 53,317.80 × 12,169.20
  4. Step 4: Simplify right side
    35,540.40x = 648,834,971.76
  5. Step 5: Solve for x
    x = 648,834,971.76/35,540.40
  6. Step 6: Final answer
    x = 18,256.27

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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.