Home / 21,384.81-29,511.08-11,953.37

Finding the Fourth Proportional to 21,384.81, 29,511.08 and 11,953.37

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Solution

The fourth proportional to 21,384.81, 29,511.08 and 11,953.37 is: 16,495.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,384.81 : 29,511.08 = 11,953.37 : x
  2. Step 2: Convert to fraction form
    21,384.81/29,511.08 = 11,953.37/x
  3. Step 3: Cross multiply
    21,384.81x = 29,511.08 × 11,953.37
  4. Step 4: Simplify right side
    21,384.81x = 352,756,651.02
  5. Step 5: Solve for x
    x = 352,756,651.02/21,384.81
  6. Step 6: Final answer
    x = 16,495.66

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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.