Home / 14,078.28-21,118.56-3,690

Finding the Fourth Proportional to 14,078.28, 21,118.56 and 3,690

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Solution

The fourth proportional to 14,078.28, 21,118.56 and 3,690 is: 5,535.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,078.28 : 21,118.56 = 3,690 : x
  2. Step 2: Convert to fraction form
    14,078.28/21,118.56 = 3,690/x
  3. Step 3: Cross multiply
    14,078.28x = 21,118.56 × 3,690
  4. Step 4: Simplify right side
    14,078.28x = 77,927,486.40
  5. Step 5: Solve for x
    x = 77,927,486.40/14,078.28
  6. Step 6: Final answer
    x = 5,535.30

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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.