Home / 12,928.88-17,842.75-8,687.05

Finding the Fourth Proportional to 12,928.88, 17,842.75 and 8,687.05

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Solution

The fourth proportional to 12,928.88, 17,842.75 and 8,687.05 is: 11,988.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,928.88 : 17,842.75 = 8,687.05 : x
  2. Step 2: Convert to fraction form
    12,928.88/17,842.75 = 8,687.05/x
  3. Step 3: Cross multiply
    12,928.88x = 17,842.75 × 8,687.05
  4. Step 4: Simplify right side
    12,928.88x = 155,000,795.06
  5. Step 5: Solve for x
    x = 155,000,795.06/12,928.88
  6. Step 6: Final answer
    x = 11,988.72

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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.