Home / 21,787.60-32,681.40-7,934.80

Finding the Fourth Proportional to 21,787.60, 32,681.40 and 7,934.80

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Solution

The fourth proportional to 21,787.60, 32,681.40 and 7,934.80 is: 11,902.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,787.60 : 32,681.40 = 7,934.80 : x
  2. Step 2: Convert to fraction form
    21,787.60/32,681.40 = 7,934.80/x
  3. Step 3: Cross multiply
    21,787.60x = 32,681.40 × 7,934.80
  4. Step 4: Simplify right side
    21,787.60x = 259,320,372.72
  5. Step 5: Solve for x
    x = 259,320,372.72/21,787.60
  6. Step 6: Final answer
    x = 11,902.20

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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.