Home / 20,327.20-30,490.80-13,400.08

Finding the Fourth Proportional to 20,327.20, 30,490.80 and 13,400.08

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Solution

The fourth proportional to 20,327.20, 30,490.80 and 13,400.08 is: 20,100.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,327.20 : 30,490.80 = 13,400.08 : x
  2. Step 2: Convert to fraction form
    20,327.20/30,490.80 = 13,400.08/x
  3. Step 3: Cross multiply
    20,327.20x = 30,490.80 × 13,400.08
  4. Step 4: Simplify right side
    20,327.20x = 408,578,973.31
  5. Step 5: Solve for x
    x = 408,578,973.31/20,327.20
  6. Step 6: Final answer
    x = 20,100.12

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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.