Home / 20,392.34-28,141.56-11,900.36

Finding the Fourth Proportional to 20,392.34, 28,141.56 and 11,900.36

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Solution

The fourth proportional to 20,392.34, 28,141.56 and 11,900.36 is: 16,422.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,392.34 : 28,141.56 = 11,900.36 : x
  2. Step 2: Convert to fraction form
    20,392.34/28,141.56 = 11,900.36/x
  3. Step 3: Cross multiply
    20,392.34x = 28,141.56 × 11,900.36
  4. Step 4: Simplify right side
    20,392.34x = 334,894,694.96
  5. Step 5: Solve for x
    x = 334,894,694.96/20,392.34
  6. Step 6: Final answer
    x = 16,422.57

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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.