Home / 13,438.63-18,543.90-7,469.34

Finding the Fourth Proportional to 13,438.63, 18,543.90 and 7,469.34

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Solution

The fourth proportional to 13,438.63, 18,543.90 and 7,469.34 is: 10,306.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,438.63 : 18,543.90 = 7,469.34 : x
  2. Step 2: Convert to fraction form
    13,438.63/18,543.90 = 7,469.34/x
  3. Step 3: Cross multiply
    13,438.63x = 18,543.90 × 7,469.34
  4. Step 4: Simplify right side
    13,438.63x = 138,510,694.03
  5. Step 5: Solve for x
    x = 138,510,694.03/13,438.63
  6. Step 6: Final answer
    x = 10,306.91

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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.