Home / 12,219.19-18,328.78-4,428

Finding the Fourth Proportional to 12,219.19, 18,328.78 and 4,428

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Solution

The fourth proportional to 12,219.19, 18,328.78 and 4,428 is: 6,642

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,219.19 : 18,328.78 = 4,428 : x
  2. Step 2: Convert to fraction form
    12,219.19/18,328.78 = 4,428/x
  3. Step 3: Cross multiply
    12,219.19x = 18,328.78 × 4,428
  4. Step 4: Simplify right side
    12,219.19x = 81,159,843.38
  5. Step 5: Solve for x
    x = 81,159,843.38/12,219.19
  6. Step 6: Final answer
    x = 6,642

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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.