Home / 12,984.32-19,479.30-4,220.12

Finding the Fourth Proportional to 12,984.32, 19,479.30 and 4,220.12

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Solution

The fourth proportional to 12,984.32, 19,479.30 and 4,220.12 is: 6,331.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,984.32 : 19,479.30 = 4,220.12 : x
  2. Step 2: Convert to fraction form
    12,984.32/19,479.30 = 4,220.12/x
  3. Step 3: Cross multiply
    12,984.32x = 19,479.30 × 4,220.12
  4. Step 4: Simplify right side
    12,984.32x = 82,204,983.52
  5. Step 5: Solve for x
    x = 82,204,983.52/12,984.32
  6. Step 6: Final answer
    x = 6,331.10

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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.