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Finding the Fourth Proportional to 18,810, 25,940.56 and 13,502.88

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Solution

The fourth proportional to 18,810, 25,940.56 and 13,502.88 is: 18,621.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,810 : 25,940.56 = 13,502.88 : x
  2. Step 2: Convert to fraction form
    18,810/25,940.56 = 13,502.88/x
  3. Step 3: Cross multiply
    18,810x = 25,940.56 × 13,502.88
  4. Step 4: Simplify right side
    18,810x = 350,272,268.81
  5. Step 5: Solve for x
    x = 350,272,268.81/18,810
  6. Step 6: Final answer
    x = 18,621.60

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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.