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Finding the Fourth Proportional to 45,354.28, 68,048.70 and 20,713

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Solution

The fourth proportional to 45,354.28, 68,048.70 and 20,713 is: 31,077.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,354.28 : 68,048.70 = 20,713 : x
  2. Step 2: Convert to fraction form
    45,354.28/68,048.70 = 20,713/x
  3. Step 3: Cross multiply
    45,354.28x = 68,048.70 × 20,713
  4. Step 4: Simplify right side
    45,354.28x = 1,409,492,723.10
  5. Step 5: Solve for x
    x = 1,409,492,723.10/45,354.28
  6. Step 6: Final answer
    x = 31,077.39

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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.