Home / 21,218.94-29,281.86-11,787.30

Finding the Fourth Proportional to 21,218.94, 29,281.86 and 11,787.30

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Solution

The fourth proportional to 21,218.94, 29,281.86 and 11,787.30 is: 16,266.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,218.94 : 29,281.86 = 11,787.30 : x
  2. Step 2: Convert to fraction form
    21,218.94/29,281.86 = 11,787.30/x
  3. Step 3: Cross multiply
    21,218.94x = 29,281.86 × 11,787.30
  4. Step 4: Simplify right side
    21,218.94x = 345,154,068.38
  5. Step 5: Solve for x
    x = 345,154,068.38/21,218.94
  6. Step 6: Final answer
    x = 16,266.32

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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.