Home / 20,373.27-28,114.86-11,420.76

Finding the Fourth Proportional to 20,373.27, 28,114.86 and 11,420.76

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Solution

The fourth proportional to 20,373.27, 28,114.86 and 11,420.76 is: 15,760.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,373.27 : 28,114.86 = 11,420.76 : x
  2. Step 2: Convert to fraction form
    20,373.27/28,114.86 = 11,420.76/x
  3. Step 3: Cross multiply
    20,373.27x = 28,114.86 × 11,420.76
  4. Step 4: Simplify right side
    20,373.27x = 321,093,068.49
  5. Step 5: Solve for x
    x = 321,093,068.49/20,373.27
  6. Step 6: Final answer
    x = 15,760.51

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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.