Home / 21,787.12-32,684.28-8,639.56

Finding the Fourth Proportional to 21,787.12, 32,684.28 and 8,639.56

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Solution

The fourth proportional to 21,787.12, 32,684.28 and 8,639.56 is: 12,960.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,787.12 : 32,684.28 = 8,639.56 : x
  2. Step 2: Convert to fraction form
    21,787.12/32,684.28 = 8,639.56/x
  3. Step 3: Cross multiply
    21,787.12x = 32,684.28 × 8,639.56
  4. Step 4: Simplify right side
    21,787.12x = 282,377,798.12
  5. Step 5: Solve for x
    x = 282,377,798.12/21,787.12
  6. Step 6: Final answer
    x = 12,960.77

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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.