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Finding the Fourth Proportional to 18,989.28, 28,477.44 and 7,306.56

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Solution

The fourth proportional to 18,989.28, 28,477.44 and 7,306.56 is: 10,957.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,989.28 : 28,477.44 = 7,306.56 : x
  2. Step 2: Convert to fraction form
    18,989.28/28,477.44 = 7,306.56/x
  3. Step 3: Cross multiply
    18,989.28x = 28,477.44 × 7,306.56
  4. Step 4: Simplify right side
    18,989.28x = 208,072,124.01
  5. Step 5: Solve for x
    x = 208,072,124.01/18,989.28
  6. Step 6: Final answer
    x = 10,957.35

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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.