Home / 20,482.20-30,679.56-12,667.32

Finding the Fourth Proportional to 20,482.20, 30,679.56 and 12,667.32

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Solution

The fourth proportional to 20,482.20, 30,679.56 and 12,667.32 is: 18,973.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,482.20 : 30,679.56 = 12,667.32 : x
  2. Step 2: Convert to fraction form
    20,482.20/30,679.56 = 12,667.32/x
  3. Step 3: Cross multiply
    20,482.20x = 30,679.56 × 12,667.32
  4. Step 4: Simplify right side
    20,482.20x = 388,627,803.98
  5. Step 5: Solve for x
    x = 388,627,803.98/20,482.20
  6. Step 6: Final answer
    x = 18,973.93

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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.