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Finding the Fourth Proportional to 18,977.28, 28,465.84 and 7,282.29

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Solution

The fourth proportional to 18,977.28, 28,465.84 and 7,282.29 is: 10,923.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,977.28 : 28,465.84 = 7,282.29 : x
  2. Step 2: Convert to fraction form
    18,977.28/28,465.84 = 7,282.29/x
  3. Step 3: Cross multiply
    18,977.28x = 28,465.84 × 7,282.29
  4. Step 4: Simplify right side
    18,977.28x = 207,296,501.97
  5. Step 5: Solve for x
    x = 207,296,501.97/18,977.28
  6. Step 6: Final answer
    x = 10,923.40

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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.