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Finding the Fourth Proportional to 18,955.84, 28,446.72 and 9,728.32

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Solution

The fourth proportional to 18,955.84, 28,446.72 and 9,728.32 is: 14,599.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,955.84 : 28,446.72 = 9,728.32 : x
  2. Step 2: Convert to fraction form
    18,955.84/28,446.72 = 9,728.32/x
  3. Step 3: Cross multiply
    18,955.84x = 28,446.72 × 9,728.32
  4. Step 4: Simplify right side
    18,955.84x = 276,738,795.11
  5. Step 5: Solve for x
    x = 276,738,795.11/18,955.84
  6. Step 6: Final answer
    x = 14,599.13

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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.