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Finding the Fourth Proportional to 18,457.45, 25,472.87 and 15,090.88

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Solution

The fourth proportional to 18,457.45, 25,472.87 and 15,090.88 is: 20,826.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,457.45 : 25,472.87 = 15,090.88 : x
  2. Step 2: Convert to fraction form
    18,457.45/25,472.87 = 15,090.88/x
  3. Step 3: Cross multiply
    18,457.45x = 25,472.87 × 15,090.88
  4. Step 4: Simplify right side
    18,457.45x = 384,408,024.43
  5. Step 5: Solve for x
    x = 384,408,024.43/18,457.45
  6. Step 6: Final answer
    x = 20,826.71

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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.