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Finding the Fourth Proportional to 18,765.25, 25,852.21 and 13,089.88

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Solution

The fourth proportional to 18,765.25, 25,852.21 and 13,089.88 is: 18,033.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,765.25 : 25,852.21 = 13,089.88 : x
  2. Step 2: Convert to fraction form
    18,765.25/25,852.21 = 13,089.88/x
  3. Step 3: Cross multiply
    18,765.25x = 25,852.21 × 13,089.88
  4. Step 4: Simplify right side
    18,765.25x = 338,402,326.63
  5. Step 5: Solve for x
    x = 338,402,326.63/18,765.25
  6. Step 6: Final answer
    x = 18,033.46

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1.5x scale

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.