Home / 21,861.40-32,705.70-19,787.80

Finding the Fourth Proportional to 21,861.40, 32,705.70 and 19,787.80

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Solution

The fourth proportional to 21,861.40, 32,705.70 and 19,787.80 is: 29,603.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,861.40 : 32,705.70 = 19,787.80 : x
  2. Step 2: Convert to fraction form
    21,861.40/32,705.70 = 19,787.80/x
  3. Step 3: Cross multiply
    21,861.40x = 32,705.70 × 19,787.80
  4. Step 4: Simplify right side
    21,861.40x = 647,173,850.46
  5. Step 5: Solve for x
    x = 647,173,850.46/21,861.40
  6. Step 6: Final answer
    x = 29,603.50

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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.