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Finding the Fourth Proportional to 42,563.32, 63,859.32 and 18,867.64

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Solution

The fourth proportional to 42,563.32, 63,859.32 and 18,867.64 is: 28,307.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,563.32 : 63,859.32 = 18,867.64 : x
  2. Step 2: Convert to fraction form
    42,563.32/63,859.32 = 18,867.64/x
  3. Step 3: Cross multiply
    42,563.32x = 63,859.32 × 18,867.64
  4. Step 4: Simplify right side
    42,563.32x = 1,204,874,660.40
  5. Step 5: Solve for x
    x = 1,204,874,660.40/42,563.32
  6. Step 6: Final answer
    x = 28,307.82

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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.