Home / 12,418.90-17,159.79-9,787.30

Finding the Fourth Proportional to 12,418.90, 17,159.79 and 9,787.30

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Solution

The fourth proportional to 12,418.90, 17,159.79 and 9,787.30 is: 13,523.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,418.90 : 17,159.79 = 9,787.30 : x
  2. Step 2: Convert to fraction form
    12,418.90/17,159.79 = 9,787.30/x
  3. Step 3: Cross multiply
    12,418.90x = 17,159.79 × 9,787.30
  4. Step 4: Simplify right side
    12,418.90x = 167,948,012.67
  5. Step 5: Solve for x
    x = 167,948,012.67/12,418.90
  6. Step 6: Final answer
    x = 13,523.58

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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.