Home / 20,880.81-28,816.02-11,449.44

Finding the Fourth Proportional to 20,880.81, 28,816.02 and 11,449.44

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Solution

The fourth proportional to 20,880.81, 28,816.02 and 11,449.44 is: 15,800.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,880.81 : 28,816.02 = 11,449.44 : x
  2. Step 2: Convert to fraction form
    20,880.81/28,816.02 = 11,449.44/x
  3. Step 3: Cross multiply
    20,880.81x = 28,816.02 × 11,449.44
  4. Step 4: Simplify right side
    20,880.81x = 329,927,292.03
  5. Step 5: Solve for x
    x = 329,927,292.03/20,880.81
  6. Step 6: Final answer
    x = 15,800.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.