Home / 21,769.20-32,653.80-12,999.60

Finding the Fourth Proportional to 21,769.20, 32,653.80 and 12,999.60

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Solution

The fourth proportional to 21,769.20, 32,653.80 and 12,999.60 is: 19,499.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,769.20 : 32,653.80 = 12,999.60 : x
  2. Step 2: Convert to fraction form
    21,769.20/32,653.80 = 12,999.60/x
  3. Step 3: Cross multiply
    21,769.20x = 32,653.80 × 12,999.60
  4. Step 4: Simplify right side
    21,769.20x = 424,486,338.48
  5. Step 5: Solve for x
    x = 424,486,338.48/21,769.20
  6. Step 6: Final answer
    x = 19,499.40

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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.