Home / 11,587.72-15,988.38-7,817.88

Finding the Fourth Proportional to 11,587.72, 15,988.38 and 7,817.88

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Solution

The fourth proportional to 11,587.72, 15,988.38 and 7,817.88 is: 10,786.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,587.72 : 15,988.38 = 7,817.88 : x
  2. Step 2: Convert to fraction form
    11,587.72/15,988.38 = 7,817.88/x
  3. Step 3: Cross multiply
    11,587.72x = 15,988.38 × 7,817.88
  4. Step 4: Simplify right side
    11,587.72x = 124,995,236.23
  5. Step 5: Solve for x
    x = 124,995,236.23/11,587.72
  6. Step 6: Final answer
    x = 10,786.87

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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.