Home / 21,781.20-32,628.05-18,435.09

Finding the Fourth Proportional to 21,781.20, 32,628.05 and 18,435.09

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Solution

The fourth proportional to 21,781.20, 32,628.05 and 18,435.09 is: 27,615.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,781.20 : 32,628.05 = 18,435.09 : x
  2. Step 2: Convert to fraction form
    21,781.20/32,628.05 = 18,435.09/x
  3. Step 3: Cross multiply
    21,781.20x = 32,628.05 × 18,435.09
  4. Step 4: Simplify right side
    21,781.20x = 601,500,946.10
  5. Step 5: Solve for x
    x = 601,500,946.10/21,781.20
  6. Step 6: Final answer
    x = 27,615.60

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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.