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Finding the Fourth Proportional to 42,251.40, 63,380.40 and 18,880.20

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Solution

The fourth proportional to 42,251.40, 63,380.40 and 18,880.20 is: 28,321.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,251.40 : 63,380.40 = 18,880.20 : x
  2. Step 2: Convert to fraction form
    42,251.40/63,380.40 = 18,880.20/x
  3. Step 3: Cross multiply
    42,251.40x = 63,380.40 × 18,880.20
  4. Step 4: Simplify right side
    42,251.40x = 1,196,634,628.08
  5. Step 5: Solve for x
    x = 1,196,634,628.08/42,251.40
  6. Step 6: Final answer
    x = 28,321.77

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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.