Home / 20,989.02-28,964.88-11,557.60

Finding the Fourth Proportional to 20,989.02, 28,964.88 and 11,557.60

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Solution

The fourth proportional to 20,989.02, 28,964.88 and 11,557.60 is: 15,949.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,989.02 : 28,964.88 = 11,557.60 : x
  2. Step 2: Convert to fraction form
    20,989.02/28,964.88 = 11,557.60/x
  3. Step 3: Cross multiply
    20,989.02x = 28,964.88 × 11,557.60
  4. Step 4: Simplify right side
    20,989.02x = 334,764,497.09
  5. Step 5: Solve for x
    x = 334,764,497.09/20,989.02
  6. Step 6: Final answer
    x = 15,949.51

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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.