Home / 12,123.45-18,155.97-8,216.01

Finding the Fourth Proportional to 12,123.45, 18,155.97 and 8,216.01

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Solution

The fourth proportional to 12,123.45, 18,155.97 and 8,216.01 is: 12,304.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,123.45 : 18,155.97 = 8,216.01 : x
  2. Step 2: Convert to fraction form
    12,123.45/18,155.97 = 8,216.01/x
  3. Step 3: Cross multiply
    12,123.45x = 18,155.97 × 8,216.01
  4. Step 4: Simplify right side
    12,123.45x = 149,169,631.08
  5. Step 5: Solve for x
    x = 149,169,631.08/12,123.45
  6. Step 6: Final answer
    x = 12,304.22

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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.