Home / 12,787.83-17,638.75-7,999.47

Finding the Fourth Proportional to 12,787.83, 17,638.75 and 7,999.47

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Solution

The fourth proportional to 12,787.83, 17,638.75 and 7,999.47 is: 11,033.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,787.83 : 17,638.75 = 7,999.47 : x
  2. Step 2: Convert to fraction form
    12,787.83/17,638.75 = 7,999.47/x
  3. Step 3: Cross multiply
    12,787.83x = 17,638.75 × 7,999.47
  4. Step 4: Simplify right side
    12,787.83x = 141,100,588.71
  5. Step 5: Solve for x
    x = 141,100,588.71/12,787.83
  6. Step 6: Final answer
    x = 11,033.97

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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.