Home / 20,861.46-28,814.10-15,187.23

Finding the Fourth Proportional to 20,861.46, 28,814.10 and 15,187.23

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Solution

The fourth proportional to 20,861.46, 28,814.10 and 15,187.23 is: 20,976.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,861.46 : 28,814.10 = 15,187.23 : x
  2. Step 2: Convert to fraction form
    20,861.46/28,814.10 = 15,187.23/x
  3. Step 3: Cross multiply
    20,861.46x = 28,814.10 × 15,187.23
  4. Step 4: Simplify right side
    20,861.46x = 437,606,363.94
  5. Step 5: Solve for x
    x = 437,606,363.94/20,861.46
  6. Step 6: Final answer
    x = 20,976.79

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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.