Home / 20,412.90-30,619.35-13,025.70

Finding the Fourth Proportional to 20,412.90, 30,619.35 and 13,025.70

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Solution

The fourth proportional to 20,412.90, 30,619.35 and 13,025.70 is: 19,538.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,412.90 : 30,619.35 = 13,025.70 : x
  2. Step 2: Convert to fraction form
    20,412.90/30,619.35 = 13,025.70/x
  3. Step 3: Cross multiply
    20,412.90x = 30,619.35 × 13,025.70
  4. Step 4: Simplify right side
    20,412.90x = 398,838,467.30
  5. Step 5: Solve for x
    x = 398,838,467.30/20,412.90
  6. Step 6: Final answer
    x = 19,538.55

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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.