Home / 13,438.55-18,542.50-8,133.72

Finding the Fourth Proportional to 13,438.55, 18,542.50 and 8,133.72

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Solution

The fourth proportional to 13,438.55, 18,542.50 and 8,133.72 is: 11,222.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,438.55 : 18,542.50 = 8,133.72 : x
  2. Step 2: Convert to fraction form
    13,438.55/18,542.50 = 8,133.72/x
  3. Step 3: Cross multiply
    13,438.55x = 18,542.50 × 8,133.72
  4. Step 4: Simplify right side
    13,438.55x = 150,819,482.77
  5. Step 5: Solve for x
    x = 150,819,482.77/13,438.55
  6. Step 6: Final answer
    x = 11,222.90

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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.