Home / 12,439.40-18,642.54-4,640.36

Finding the Fourth Proportional to 12,439.40, 18,642.54 and 4,640.36

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Solution

The fourth proportional to 12,439.40, 18,642.54 and 4,640.36 is: 6,954.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,439.40 : 18,642.54 = 4,640.36 : x
  2. Step 2: Convert to fraction form
    12,439.40/18,642.54 = 4,640.36/x
  3. Step 3: Cross multiply
    12,439.40x = 18,642.54 × 4,640.36
  4. Step 4: Simplify right side
    12,439.40x = 86,508,096.91
  5. Step 5: Solve for x
    x = 86,508,096.91/12,439.40
  6. Step 6: Final answer
    x = 6,954.36

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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.