Home / 21,787.28-30,066.36-12,834.72

Finding the Fourth Proportional to 21,787.28, 30,066.36 and 12,834.72

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Solution

The fourth proportional to 21,787.28, 30,066.36 and 12,834.72 is: 17,711.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,787.28 : 30,066.36 = 12,834.72 : x
  2. Step 2: Convert to fraction form
    21,787.28/30,066.36 = 12,834.72/x
  3. Step 3: Cross multiply
    21,787.28x = 30,066.36 × 12,834.72
  4. Step 4: Simplify right side
    21,787.28x = 385,893,312.02
  5. Step 5: Solve for x
    x = 385,893,312.02/21,787.28
  6. Step 6: Final answer
    x = 17,711.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.