Home / 20,399.69-28,152.52-11,900.46

Finding the Fourth Proportional to 20,399.69, 28,152.52 and 11,900.46

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Solution

The fourth proportional to 20,399.69, 28,152.52 and 11,900.46 is: 16,423.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,399.69 : 28,152.52 = 11,900.46 : x
  2. Step 2: Convert to fraction form
    20,399.69/28,152.52 = 11,900.46/x
  3. Step 3: Cross multiply
    20,399.69x = 28,152.52 × 11,900.46
  4. Step 4: Simplify right side
    20,399.69x = 335,027,938.16
  5. Step 5: Solve for x
    x = 335,027,938.16/20,399.69
  6. Step 6: Final answer
    x = 16,423.19

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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.