Home / 20,621.76-28,468.08-12,665.76

Finding the Fourth Proportional to 20,621.76, 28,468.08 and 12,665.76

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Solution

The fourth proportional to 20,621.76, 28,468.08 and 12,665.76 is: 17,484.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,621.76 : 28,468.08 = 12,665.76 : x
  2. Step 2: Convert to fraction form
    20,621.76/28,468.08 = 12,665.76/x
  3. Step 3: Cross multiply
    20,621.76x = 28,468.08 × 12,665.76
  4. Step 4: Simplify right side
    20,621.76x = 360,569,868.94
  5. Step 5: Solve for x
    x = 360,569,868.94/20,621.76
  6. Step 6: Final answer
    x = 17,484.92

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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.