Home / 12,648.30-17,455.90-7,342.80

Finding the Fourth Proportional to 12,648.30, 17,455.90 and 7,342.80

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Solution

The fourth proportional to 12,648.30, 17,455.90 and 7,342.80 is: 10,133.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,648.30 : 17,455.90 = 7,342.80 : x
  2. Step 2: Convert to fraction form
    12,648.30/17,455.90 = 7,342.80/x
  3. Step 3: Cross multiply
    12,648.30x = 17,455.90 × 7,342.80
  4. Step 4: Simplify right side
    12,648.30x = 128,175,207.80
  5. Step 5: Solve for x
    x = 128,175,207.80/12,648.30
  6. Step 6: Final answer
    x = 10,133.79

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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.