Home / 21,219.12-29,281.86-11,787.71

Finding the Fourth Proportional to 21,219.12, 29,281.86 and 11,787.71

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Solution

The fourth proportional to 21,219.12, 29,281.86 and 11,787.71 is: 16,266.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,219.12 : 29,281.86 = 11,787.71 : x
  2. Step 2: Convert to fraction form
    21,219.12/29,281.86 = 11,787.71/x
  3. Step 3: Cross multiply
    21,219.12x = 29,281.86 × 11,787.71
  4. Step 4: Simplify right side
    21,219.12x = 345,165,927.53
  5. Step 5: Solve for x
    x = 345,165,927.53/21,219.12
  6. Step 6: Final answer
    x = 16,266.74

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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.