Home / 13,285.84-18,201.68-12,787.60

Finding the Fourth Proportional to 13,285.84, 18,201.68 and 12,787.60

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Solution

The fourth proportional to 13,285.84, 18,201.68 and 12,787.60 is: 17,519.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,285.84 : 18,201.68 = 12,787.60 : x
  2. Step 2: Convert to fraction form
    13,285.84/18,201.68 = 12,787.60/x
  3. Step 3: Cross multiply
    13,285.84x = 18,201.68 × 12,787.60
  4. Step 4: Simplify right side
    13,285.84x = 232,755,803.17
  5. Step 5: Solve for x
    x = 232,755,803.17/13,285.84
  6. Step 6: Final answer
    x = 17,519.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.