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Finding the Fourth Proportional to 15,088.56, 20,819.07 and 9,119.07

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Solution

The fourth proportional to 15,088.56, 20,819.07 and 9,119.07 is: 12,582.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,088.56 : 20,819.07 = 9,119.07 : x
  2. Step 2: Convert to fraction form
    15,088.56/20,819.07 = 9,119.07/x
  3. Step 3: Cross multiply
    15,088.56x = 20,819.07 × 9,119.07
  4. Step 4: Simplify right side
    15,088.56x = 189,850,556.66
  5. Step 5: Solve for x
    x = 189,850,556.66/15,088.56
  6. Step 6: Final answer
    x = 12,582.42

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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.