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Finding the Fourth Proportional to 53,995.60, 81,004.20 and 18,959.86

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Solution

The fourth proportional to 53,995.60, 81,004.20 and 18,959.86 is: 28,443.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,995.60 : 81,004.20 = 18,959.86 : x
  2. Step 2: Convert to fraction form
    53,995.60/81,004.20 = 18,959.86/x
  3. Step 3: Cross multiply
    53,995.60x = 81,004.20 × 18,959.86
  4. Step 4: Simplify right side
    53,995.60x = 1,535,828,291.41
  5. Step 5: Solve for x
    x = 1,535,828,291.41/53,995.60
  6. Step 6: Final answer
    x = 28,443.58

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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.