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Finding the Fourth Proportional to 18,983.16, 28,435.06 and 15,265.28

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Solution

The fourth proportional to 18,983.16, 28,435.06 and 15,265.28 is: 22,866.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,983.16 : 28,435.06 = 15,265.28 : x
  2. Step 2: Convert to fraction form
    18,983.16/28,435.06 = 15,265.28/x
  3. Step 3: Cross multiply
    18,983.16x = 28,435.06 × 15,265.28
  4. Step 4: Simplify right side
    18,983.16x = 434,069,152.72
  5. Step 5: Solve for x
    x = 434,069,152.72/18,983.16
  6. Step 6: Final answer
    x = 22,866.01

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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.