Home / 12,854.21-17,738.67-7,188.89

Finding the Fourth Proportional to 12,854.21, 17,738.67 and 7,188.89

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Solution

The fourth proportional to 12,854.21, 17,738.67 and 7,188.89 is: 9,920.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,854.21 : 17,738.67 = 7,188.89 : x
  2. Step 2: Convert to fraction form
    12,854.21/17,738.67 = 7,188.89/x
  3. Step 3: Cross multiply
    12,854.21x = 17,738.67 × 7,188.89
  4. Step 4: Simplify right side
    12,854.21x = 127,521,285.64
  5. Step 5: Solve for x
    x = 127,521,285.64/12,854.21
  6. Step 6: Final answer
    x = 9,920.59

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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.