Home / 21,006.50-28,989.58-11,575.67

Finding the Fourth Proportional to 21,006.50, 28,989.58 and 11,575.67

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Solution

The fourth proportional to 21,006.50, 28,989.58 and 11,575.67 is: 15,974.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,006.50 : 28,989.58 = 11,575.67 : x
  2. Step 2: Convert to fraction form
    21,006.50/28,989.58 = 11,575.67/x
  3. Step 3: Cross multiply
    21,006.50x = 28,989.58 × 11,575.67
  4. Step 4: Simplify right side
    21,006.50x = 335,573,782.58
  5. Step 5: Solve for x
    x = 335,573,782.58/21,006.50
  6. Step 6: Final answer
    x = 15,974.76

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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.