Home / 20,966.22-28,923.70-13,408.76

Finding the Fourth Proportional to 20,966.22, 28,923.70 and 13,408.76

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Solution

The fourth proportional to 20,966.22, 28,923.70 and 13,408.76 is: 18,497.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,966.22 : 28,923.70 = 13,408.76 : x
  2. Step 2: Convert to fraction form
    20,966.22/28,923.70 = 13,408.76/x
  3. Step 3: Cross multiply
    20,966.22x = 28,923.70 × 13,408.76
  4. Step 4: Simplify right side
    20,966.22x = 387,830,951.61
  5. Step 5: Solve for x
    x = 387,830,951.61/20,966.22
  6. Step 6: Final answer
    x = 18,497.90

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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.