Home / 21,787.60-32,719.80-21,096.40

Finding the Fourth Proportional to 21,787.60, 32,719.80 and 21,096.40

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Solution

The fourth proportional to 21,787.60, 32,719.80 and 21,096.40 is: 31,681.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,787.60 : 32,719.80 = 21,096.40 : x
  2. Step 2: Convert to fraction form
    21,787.60/32,719.80 = 21,096.40/x
  3. Step 3: Cross multiply
    21,787.60x = 32,719.80 × 21,096.40
  4. Step 4: Simplify right side
    21,787.60x = 690,269,988.72
  5. Step 5: Solve for x
    x = 690,269,988.72/21,787.60
  6. Step 6: Final answer
    x = 31,681.78

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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.