Home / 20,964.76-28,931.38-12,581.26

Finding the Fourth Proportional to 20,964.76, 28,931.38 and 12,581.26

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Solution

The fourth proportional to 20,964.76, 28,931.38 and 12,581.26 is: 17,362.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,964.76 : 28,931.38 = 12,581.26 : x
  2. Step 2: Convert to fraction form
    20,964.76/28,931.38 = 12,581.26/x
  3. Step 3: Cross multiply
    20,964.76x = 28,931.38 × 12,581.26
  4. Step 4: Simplify right side
    20,964.76x = 363,993,213.94
  5. Step 5: Solve for x
    x = 363,993,213.94/20,964.76
  6. Step 6: Final answer
    x = 17,362.15

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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.