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Finding the Fourth Proportional to 18,700.42, 28,023.90 and 13,731.07

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Solution

The fourth proportional to 18,700.42, 28,023.90 and 13,731.07 is: 20,576.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,700.42 : 28,023.90 = 13,731.07 : x
  2. Step 2: Convert to fraction form
    18,700.42/28,023.90 = 13,731.07/x
  3. Step 3: Cross multiply
    18,700.42x = 28,023.90 × 13,731.07
  4. Step 4: Simplify right side
    18,700.42x = 384,798,132.57
  5. Step 5: Solve for x
    x = 384,798,132.57/18,700.42
  6. Step 6: Final answer
    x = 20,576.98

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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.