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Finding the Fourth Proportional to 12,123.53, 18,204.44 and 7,215.08

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Solution

The fourth proportional to 12,123.53, 18,204.44 and 7,215.08 is: 10,834.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,123.53 : 18,204.44 = 7,215.08 : x
  2. Step 2: Convert to fraction form
    12,123.53/18,204.44 = 7,215.08/x
  3. Step 3: Cross multiply
    12,123.53x = 18,204.44 × 7,215.08
  4. Step 4: Simplify right side
    12,123.53x = 131,346,490.96
  5. Step 5: Solve for x
    x = 131,346,490.96/12,123.53
  6. Step 6: Final answer
    x = 10,834.01

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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.