Home / 20,663.06-28,515.02-12,279.56

Finding the Fourth Proportional to 20,663.06, 28,515.02 and 12,279.56

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Solution

The fourth proportional to 20,663.06, 28,515.02 and 12,279.56 is: 16,945.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,663.06 : 28,515.02 = 12,279.56 : x
  2. Step 2: Convert to fraction form
    20,663.06/28,515.02 = 12,279.56/x
  3. Step 3: Cross multiply
    20,663.06x = 28,515.02 × 12,279.56
  4. Step 4: Simplify right side
    20,663.06x = 350,151,898.99
  5. Step 5: Solve for x
    x = 350,151,898.99/20,663.06
  6. Step 6: Final answer
    x = 16,945.79

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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.