Home / 13,405.12-18,486.95-8,369.80

Finding the Fourth Proportional to 13,405.12, 18,486.95 and 8,369.80

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Solution

The fourth proportional to 13,405.12, 18,486.95 and 8,369.80 is: 11,542.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,405.12 : 18,486.95 = 8,369.80 : x
  2. Step 2: Convert to fraction form
    13,405.12/18,486.95 = 8,369.80/x
  3. Step 3: Cross multiply
    13,405.12x = 18,486.95 × 8,369.80
  4. Step 4: Simplify right side
    13,405.12x = 154,732,074.11
  5. Step 5: Solve for x
    x = 154,732,074.11/13,405.12
  6. Step 6: Final answer
    x = 11,542.76

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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.