Home / 21,202.80-31,804.20-15,327.60

Finding the Fourth Proportional to 21,202.80, 31,804.20 and 15,327.60

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Solution

The fourth proportional to 21,202.80, 31,804.20 and 15,327.60 is: 22,991.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,202.80 : 31,804.20 = 15,327.60 : x
  2. Step 2: Convert to fraction form
    21,202.80/31,804.20 = 15,327.60/x
  3. Step 3: Cross multiply
    21,202.80x = 31,804.20 × 15,327.60
  4. Step 4: Simplify right side
    21,202.80x = 487,482,055.92
  5. Step 5: Solve for x
    x = 487,482,055.92/21,202.80
  6. Step 6: Final answer
    x = 22,991.40

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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.