Home / 15,685.92-21,645.82-8,515.67

Finding the Fourth Proportional to 15,685.92, 21,645.82 and 8,515.67

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Solution

The fourth proportional to 15,685.92, 21,645.82 and 8,515.67 is: 11,751.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,685.92 : 21,645.82 = 8,515.67 : x
  2. Step 2: Convert to fraction form
    15,685.92/21,645.82 = 8,515.67/x
  3. Step 3: Cross multiply
    15,685.92x = 21,645.82 × 8,515.67
  4. Step 4: Simplify right side
    15,685.92x = 184,328,514.51
  5. Step 5: Solve for x
    x = 184,328,514.51/15,685.92
  6. Step 6: Final answer
    x = 11,751.21

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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.