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Finding the Fourth Proportional to 13,598.64, 20,389.64 and 12,438.42

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Solution

The fourth proportional to 13,598.64, 20,389.64 and 12,438.42 is: 18,650.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,598.64 : 20,389.64 = 12,438.42 : x
  2. Step 2: Convert to fraction form
    13,598.64/20,389.64 = 12,438.42/x
  3. Step 3: Cross multiply
    13,598.64x = 20,389.64 × 12,438.42
  4. Step 4: Simplify right side
    13,598.64x = 253,614,905.97
  5. Step 5: Solve for x
    x = 253,614,905.97/13,598.64
  6. Step 6: Final answer
    x = 18,650.02

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.