Home / 21,705.40-32,558.10-12,811.60

Finding the Fourth Proportional to 21,705.40, 32,558.10 and 12,811.60

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Solution

The fourth proportional to 21,705.40, 32,558.10 and 12,811.60 is: 19,217.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,705.40 : 32,558.10 = 12,811.60 : x
  2. Step 2: Convert to fraction form
    21,705.40/32,558.10 = 12,811.60/x
  3. Step 3: Cross multiply
    21,705.40x = 32,558.10 × 12,811.60
  4. Step 4: Simplify right side
    21,705.40x = 417,121,353.96
  5. Step 5: Solve for x
    x = 417,121,353.96/21,705.40
  6. Step 6: Final answer
    x = 19,217.40

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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.