Home / 21,890.20-32,859.60-16,981.60

Finding the Fourth Proportional to 21,890.20, 32,859.60 and 16,981.60

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Solution

The fourth proportional to 21,890.20, 32,859.60 and 16,981.60 is: 25,491.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,890.20 : 32,859.60 = 16,981.60 : x
  2. Step 2: Convert to fraction form
    21,890.20/32,859.60 = 16,981.60/x
  3. Step 3: Cross multiply
    21,890.20x = 32,859.60 × 16,981.60
  4. Step 4: Simplify right side
    21,890.20x = 558,008,583.36
  5. Step 5: Solve for x
    x = 558,008,583.36/21,890.20
  6. Step 6: Final answer
    x = 25,491.25

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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.