Home / 21,919.50-32,860.80-8,764.70

Finding the Fourth Proportional to 21,919.50, 32,860.80 and 8,764.70

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Solution

The fourth proportional to 21,919.50, 32,860.80 and 8,764.70 is: 13,139.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,919.50 : 32,860.80 = 8,764.70 : x
  2. Step 2: Convert to fraction form
    21,919.50/32,860.80 = 8,764.70/x
  3. Step 3: Cross multiply
    21,919.50x = 32,860.80 × 8,764.70
  4. Step 4: Simplify right side
    21,919.50x = 288,014,889.46
  5. Step 5: Solve for x
    x = 288,014,889.46/21,919.50
  6. Step 6: Final answer
    x = 13,139.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.