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Finding the Fourth Proportional to 33,980.31, 50,970.50 and 12,915.40

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Solution

The fourth proportional to 33,980.31, 50,970.50 and 12,915.40 is: 19,373.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    33,980.31 : 50,970.50 = 12,915.40 : x
  2. Step 2: Convert to fraction form
    33,980.31/50,970.50 = 12,915.40/x
  3. Step 3: Cross multiply
    33,980.31x = 50,970.50 × 12,915.40
  4. Step 4: Simplify right side
    33,980.31x = 658,304,347.70
  5. Step 5: Solve for x
    x = 658,304,347.70/33,980.31
  6. Step 6: Final answer
    x = 19,373.11

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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.