Home / 20,429.95-28,190.26-11,475.74

Finding the Fourth Proportional to 20,429.95, 28,190.26 and 11,475.74

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Solution

The fourth proportional to 20,429.95, 28,190.26 and 11,475.74 is: 15,834.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,429.95 : 28,190.26 = 11,475.74 : x
  2. Step 2: Convert to fraction form
    20,429.95/28,190.26 = 11,475.74/x
  3. Step 3: Cross multiply
    20,429.95x = 28,190.26 × 11,475.74
  4. Step 4: Simplify right side
    20,429.95x = 323,504,094.29
  5. Step 5: Solve for x
    x = 323,504,094.29/20,429.95
  6. Step 6: Final answer
    x = 15,834.80

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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.