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Finding the Fourth Proportional to 18,768.16, 28,159.68 and 7,084.48

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Solution

The fourth proportional to 18,768.16, 28,159.68 and 7,084.48 is: 10,629.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,768.16 : 28,159.68 = 7,084.48 : x
  2. Step 2: Convert to fraction form
    18,768.16/28,159.68 = 7,084.48/x
  3. Step 3: Cross multiply
    18,768.16x = 28,159.68 × 7,084.48
  4. Step 4: Simplify right side
    18,768.16x = 199,496,689.77
  5. Step 5: Solve for x
    x = 199,496,689.77/18,768.16
  6. Step 6: Final answer
    x = 10,629.53

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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.