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Finding the Fourth Proportional to 12,228.67, 18,328.99 and 5,557.99

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Solution

The fourth proportional to 12,228.67, 18,328.99 and 5,557.99 is: 8,330.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,228.67 : 18,328.99 = 5,557.99 : x
  2. Step 2: Convert to fraction form
    12,228.67/18,328.99 = 5,557.99/x
  3. Step 3: Cross multiply
    12,228.67x = 18,328.99 × 5,557.99
  4. Step 4: Simplify right side
    12,228.67x = 101,872,343.13
  5. Step 5: Solve for x
    x = 101,872,343.13/12,228.67
  6. Step 6: Final answer
    x = 8,330.62

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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.