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Finding the Fourth Proportional to 18,270, 25,212.60 and 9,886.56

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Solution

The fourth proportional to 18,270, 25,212.60 and 9,886.56 is: 13,643.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,270 : 25,212.60 = 9,886.56 : x
  2. Step 2: Convert to fraction form
    18,270/25,212.60 = 9,886.56/x
  3. Step 3: Cross multiply
    18,270x = 25,212.60 × 9,886.56
  4. Step 4: Simplify right side
    18,270x = 249,265,882.66
  5. Step 5: Solve for x
    x = 249,265,882.66/18,270
  6. Step 6: Final answer
    x = 13,643.45

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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.