Home / 15,571.50-21,489.18-8,856.96

Finding the Fourth Proportional to 15,571.50, 21,489.18 and 8,856.96

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Solution

The fourth proportional to 15,571.50, 21,489.18 and 8,856.96 is: 12,222.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,571.50 : 21,489.18 = 8,856.96 : x
  2. Step 2: Convert to fraction form
    15,571.50/21,489.18 = 8,856.96/x
  3. Step 3: Cross multiply
    15,571.50x = 21,489.18 × 8,856.96
  4. Step 4: Simplify right side
    15,571.50x = 190,328,779.24
  5. Step 5: Solve for x
    x = 190,328,779.24/15,571.50
  6. Step 6: Final answer
    x = 12,222.89

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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.