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Finding the Fourth Proportional to 30,517.64, 45,795.72 and 12,987.44

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Solution

The fourth proportional to 30,517.64, 45,795.72 and 12,987.44 is: 19,489.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,517.64 : 45,795.72 = 12,987.44 : x
  2. Step 2: Convert to fraction form
    30,517.64/45,795.72 = 12,987.44/x
  3. Step 3: Cross multiply
    30,517.64x = 45,795.72 × 12,987.44
  4. Step 4: Simplify right side
    30,517.64x = 594,769,165.76
  5. Step 5: Solve for x
    x = 594,769,165.76/30,517.64
  6. Step 6: Final answer
    x = 19,489.36

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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.