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Finding the Fourth Proportional to 15,819.09, 21,831.02 and 9,104.59

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Solution

The fourth proportional to 15,819.09, 21,831.02 and 9,104.59 is: 12,564.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,819.09 : 21,831.02 = 9,104.59 : x
  2. Step 2: Convert to fraction form
    15,819.09/21,831.02 = 9,104.59/x
  3. Step 3: Cross multiply
    15,819.09x = 21,831.02 × 9,104.59
  4. Step 4: Simplify right side
    15,819.09x = 198,762,486.38
  5. Step 5: Solve for x
    x = 198,762,486.38/15,819.09
  6. Step 6: Final answer
    x = 12,564.72

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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.