Home / 11,971.82-16,521-6,666.52

Finding the Fourth Proportional to 11,971.82, 16,521 and 6,666.52

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Solution

The fourth proportional to 11,971.82, 16,521 and 6,666.52 is: 9,199.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,971.82 : 16,521 = 6,666.52 : x
  2. Step 2: Convert to fraction form
    11,971.82/16,521 = 6,666.52/x
  3. Step 3: Cross multiply
    11,971.82x = 16,521 × 6,666.52
  4. Step 4: Simplify right side
    11,971.82x = 110,137,576.92
  5. Step 5: Solve for x
    x = 110,137,576.92/11,971.82
  6. Step 6: Final answer
    x = 9,199.74

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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.