Home / 12,156.08-18,235.14-3,390.99

Finding the Fourth Proportional to 12,156.08, 18,235.14 and 3,390.99

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Solution

The fourth proportional to 12,156.08, 18,235.14 and 3,390.99 is: 5,086.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,156.08 : 18,235.14 = 3,390.99 : x
  2. Step 2: Convert to fraction form
    12,156.08/18,235.14 = 3,390.99/x
  3. Step 3: Cross multiply
    12,156.08x = 18,235.14 × 3,390.99
  4. Step 4: Simplify right side
    12,156.08x = 61,835,177.39
  5. Step 5: Solve for x
    x = 61,835,177.39/12,156.08
  6. Step 6: Final answer
    x = 5,086.77

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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.