Home / 20,384.76-28,138.98-13,667.94

Finding the Fourth Proportional to 20,384.76, 28,138.98 and 13,667.94

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Solution

The fourth proportional to 20,384.76, 28,138.98 and 13,667.94 is: 18,867.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,384.76 : 28,138.98 = 13,667.94 : x
  2. Step 2: Convert to fraction form
    20,384.76/28,138.98 = 13,667.94/x
  3. Step 3: Cross multiply
    20,384.76x = 28,138.98 × 13,667.94
  4. Step 4: Simplify right side
    20,384.76x = 384,601,890.30
  5. Step 5: Solve for x
    x = 384,601,890.30/20,384.76
  6. Step 6: Final answer
    x = 18,867.13

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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.