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Finding the Fourth Proportional to 15,013.63, 20,719.47 and 9,351.73

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Solution

The fourth proportional to 15,013.63, 20,719.47 and 9,351.73 is: 12,905.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,013.63 : 20,719.47 = 9,351.73 : x
  2. Step 2: Convert to fraction form
    15,013.63/20,719.47 = 9,351.73/x
  3. Step 3: Cross multiply
    15,013.63x = 20,719.47 × 9,351.73
  4. Step 4: Simplify right side
    15,013.63x = 193,762,889.18
  5. Step 5: Solve for x
    x = 193,762,889.18/15,013.63
  6. Step 6: Final answer
    x = 12,905.80

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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.