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Finding the Fourth Proportional to 45,390.40, 68,008.80 and 21,966.40

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Solution

The fourth proportional to 45,390.40, 68,008.80 and 21,966.40 is: 32,912.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,390.40 : 68,008.80 = 21,966.40 : x
  2. Step 2: Convert to fraction form
    45,390.40/68,008.80 = 21,966.40/x
  3. Step 3: Cross multiply
    45,390.40x = 68,008.80 × 21,966.40
  4. Step 4: Simplify right side
    45,390.40x = 1,493,908,504.32
  5. Step 5: Solve for x
    x = 1,493,908,504.32/45,390.40
  6. Step 6: Final answer
    x = 32,912.43

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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.