Home / 21,787.40-32,681.10-19,940.60

Finding the Fourth Proportional to 21,787.40, 32,681.10 and 19,940.60

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Solution

The fourth proportional to 21,787.40, 32,681.10 and 19,940.60 is: 29,910.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,787.40 : 32,681.10 = 19,940.60 : x
  2. Step 2: Convert to fraction form
    21,787.40/32,681.10 = 19,940.60/x
  3. Step 3: Cross multiply
    21,787.40x = 32,681.10 × 19,940.60
  4. Step 4: Simplify right side
    21,787.40x = 651,680,742.66
  5. Step 5: Solve for x
    x = 651,680,742.66/21,787.40
  6. Step 6: Final answer
    x = 29,910.90

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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.