Home / 12,638.97-17,444.43-8,390.25

Finding the Fourth Proportional to 12,638.97, 17,444.43 and 8,390.25

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Solution

The fourth proportional to 12,638.97, 17,444.43 and 8,390.25 is: 11,580.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,638.97 : 17,444.43 = 8,390.25 : x
  2. Step 2: Convert to fraction form
    12,638.97/17,444.43 = 8,390.25/x
  3. Step 3: Cross multiply
    12,638.97x = 17,444.43 × 8,390.25
  4. Step 4: Simplify right side
    12,638.97x = 146,363,128.81
  5. Step 5: Solve for x
    x = 146,363,128.81/12,638.97
  6. Step 6: Final answer
    x = 11,580.31

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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.