Home / 20,437.81-28,204.89-11,485.12

Finding the Fourth Proportional to 20,437.81, 28,204.89 and 11,485.12

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Solution

The fourth proportional to 20,437.81, 28,204.89 and 11,485.12 is: 15,849.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,437.81 : 28,204.89 = 11,485.12 : x
  2. Step 2: Convert to fraction form
    20,437.81/28,204.89 = 11,485.12/x
  3. Step 3: Cross multiply
    20,437.81x = 28,204.89 × 11,485.12
  4. Step 4: Simplify right side
    20,437.81x = 323,936,546.24
  5. Step 5: Solve for x
    x = 323,936,546.24/20,437.81
  6. Step 6: Final answer
    x = 15,849.87

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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.