Home / 20,935.36-28,890.47-11,503.72

Finding the Fourth Proportional to 20,935.36, 28,890.47 and 11,503.72

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Solution

The fourth proportional to 20,935.36, 28,890.47 and 11,503.72 is: 15,874.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,935.36 : 28,890.47 = 11,503.72 : x
  2. Step 2: Convert to fraction form
    20,935.36/28,890.47 = 11,503.72/x
  3. Step 3: Cross multiply
    20,935.36x = 28,890.47 × 11,503.72
  4. Step 4: Simplify right side
    20,935.36x = 332,347,978.53
  5. Step 5: Solve for x
    x = 332,347,978.53/20,935.36
  6. Step 6: Final answer
    x = 15,874.96

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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.