Home / 21,787.11-30,064.46-12,356.55

Finding the Fourth Proportional to 21,787.11, 30,064.46 and 12,356.55

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Solution

The fourth proportional to 21,787.11, 30,064.46 and 12,356.55 is: 17,051.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,787.11 : 30,064.46 = 12,356.55 : x
  2. Step 2: Convert to fraction form
    21,787.11/30,064.46 = 12,356.55/x
  3. Step 3: Cross multiply
    21,787.11x = 30,064.46 × 12,356.55
  4. Step 4: Simplify right side
    21,787.11x = 371,492,941.43
  5. Step 5: Solve for x
    x = 371,492,941.43/21,787.11
  6. Step 6: Final answer
    x = 17,051.04

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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.