Home / 21,810.10-32,719.80-12,454.60

Finding the Fourth Proportional to 21,810.10, 32,719.80 and 12,454.60

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Solution

The fourth proportional to 21,810.10, 32,719.80 and 12,454.60 is: 18,684.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,810.10 : 32,719.80 = 12,454.60 : x
  2. Step 2: Convert to fraction form
    21,810.10/32,719.80 = 12,454.60/x
  3. Step 3: Cross multiply
    21,810.10x = 32,719.80 × 12,454.60
  4. Step 4: Simplify right side
    21,810.10x = 407,512,021.08
  5. Step 5: Solve for x
    x = 407,512,021.08/21,810.10
  6. Step 6: Final answer
    x = 18,684.56

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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.