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Finding the Fourth Proportional to 15,087.90, 20,828.79 and 9,425.79

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Solution

The fourth proportional to 15,087.90, 20,828.79 and 9,425.79 is: 13,012.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,087.90 : 20,828.79 = 9,425.79 : x
  2. Step 2: Convert to fraction form
    15,087.90/20,828.79 = 9,425.79/x
  3. Step 3: Cross multiply
    15,087.90x = 20,828.79 × 9,425.79
  4. Step 4: Simplify right side
    15,087.90x = 196,327,696.35
  5. Step 5: Solve for x
    x = 196,327,696.35/15,087.90
  6. Step 6: Final answer
    x = 13,012.27

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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.