Home / 21,239.64-29,311.74-11,808

Finding the Fourth Proportional to 21,239.64, 29,311.74 and 11,808

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Solution

The fourth proportional to 21,239.64, 29,311.74 and 11,808 is: 16,295.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,239.64 : 29,311.74 = 11,808 : x
  2. Step 2: Convert to fraction form
    21,239.64/29,311.74 = 11,808/x
  3. Step 3: Cross multiply
    21,239.64x = 29,311.74 × 11,808
  4. Step 4: Simplify right side
    21,239.64x = 346,113,025.92
  5. Step 5: Solve for x
    x = 346,113,025.92/21,239.64
  6. Step 6: Final answer
    x = 16,295.62

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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.