Home / 12,986.40-19,479.60-4,227.36

Finding the Fourth Proportional to 12,986.40, 19,479.60 and 4,227.36

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Solution

The fourth proportional to 12,986.40, 19,479.60 and 4,227.36 is: 6,341.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,986.40 : 19,479.60 = 4,227.36 : x
  2. Step 2: Convert to fraction form
    12,986.40/19,479.60 = 4,227.36/x
  3. Step 3: Cross multiply
    12,986.40x = 19,479.60 × 4,227.36
  4. Step 4: Simplify right side
    12,986.40x = 82,347,281.86
  5. Step 5: Solve for x
    x = 82,347,281.86/12,986.40
  6. Step 6: Final answer
    x = 6,341.04

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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.