Home / 20,393.10-28,140.59-11,438.86

Finding the Fourth Proportional to 20,393.10, 28,140.59 and 11,438.86

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Solution

The fourth proportional to 20,393.10, 28,140.59 and 11,438.86 is: 15,784.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,393.10 : 28,140.59 = 11,438.86 : x
  2. Step 2: Convert to fraction form
    20,393.10/28,140.59 = 11,438.86/x
  3. Step 3: Cross multiply
    20,393.10x = 28,140.59 × 11,438.86
  4. Step 4: Simplify right side
    20,393.10x = 321,896,269.33
  5. Step 5: Solve for x
    x = 321,896,269.33/20,393.10
  6. Step 6: Final answer
    x = 15,784.57

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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.