Home / 12,219.08-18,328.54-2,985

Finding the Fourth Proportional to 12,219.08, 18,328.54 and 2,985

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Solution

The fourth proportional to 12,219.08, 18,328.54 and 2,985 is: 4,477.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,219.08 : 18,328.54 = 2,985 : x
  2. Step 2: Convert to fraction form
    12,219.08/18,328.54 = 2,985/x
  3. Step 3: Cross multiply
    12,219.08x = 18,328.54 × 2,985
  4. Step 4: Simplify right side
    12,219.08x = 54,710,691.90
  5. Step 5: Solve for x
    x = 54,710,691.90/12,219.08
  6. Step 6: Final answer
    x = 4,477.48

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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.