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Finding the Fourth Proportional to 45,758.88, 68,637.44 and 12,478.40

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Solution

The fourth proportional to 45,758.88, 68,637.44 and 12,478.40 is: 18,717.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,758.88 : 68,637.44 = 12,478.40 : x
  2. Step 2: Convert to fraction form
    45,758.88/68,637.44 = 12,478.40/x
  3. Step 3: Cross multiply
    45,758.88x = 68,637.44 × 12,478.40
  4. Step 4: Simplify right side
    45,758.88x = 856,485,431.30
  5. Step 5: Solve for x
    x = 856,485,431.30/45,758.88
  6. Step 6: Final answer
    x = 18,717.36

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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.