Home / 21,202.40-31,803.60-18,869.60

Finding the Fourth Proportional to 21,202.40, 31,803.60 and 18,869.60

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Solution

The fourth proportional to 21,202.40, 31,803.60 and 18,869.60 is: 28,304.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,202.40 : 31,803.60 = 18,869.60 : x
  2. Step 2: Convert to fraction form
    21,202.40/31,803.60 = 18,869.60/x
  3. Step 3: Cross multiply
    21,202.40x = 31,803.60 × 18,869.60
  4. Step 4: Simplify right side
    21,202.40x = 600,121,210.56
  5. Step 5: Solve for x
    x = 600,121,210.56/21,202.40
  6. Step 6: Final answer
    x = 28,304.40

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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.