Home / 20,934.56-28,889.70-11,503.72

Finding the Fourth Proportional to 20,934.56, 28,889.70 and 11,503.72

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Solution

The fourth proportional to 20,934.56, 28,889.70 and 11,503.72 is: 15,875.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,934.56 : 28,889.70 = 11,503.72 : x
  2. Step 2: Convert to fraction form
    20,934.56/28,889.70 = 11,503.72/x
  3. Step 3: Cross multiply
    20,934.56x = 28,889.70 × 11,503.72
  4. Step 4: Simplify right side
    20,934.56x = 332,339,019.68
  5. Step 5: Solve for x
    x = 332,339,019.68/20,934.56
  6. Step 6: Final answer
    x = 15,875.14

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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.