Home / 11,987.72-16,545.21-7,515.35

Finding the Fourth Proportional to 11,987.72, 16,545.21 and 7,515.35

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Solution

The fourth proportional to 11,987.72, 16,545.21 and 7,515.35 is: 10,372.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,987.72 : 16,545.21 = 7,515.35 : x
  2. Step 2: Convert to fraction form
    11,987.72/16,545.21 = 7,515.35/x
  3. Step 3: Cross multiply
    11,987.72x = 16,545.21 × 7,515.35
  4. Step 4: Simplify right side
    11,987.72x = 124,343,043.97
  5. Step 5: Solve for x
    x = 124,343,043.97/11,987.72
  6. Step 6: Final answer
    x = 10,372.53

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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.