Home / 21,513.35-29,688.03-11,953.28

Finding the Fourth Proportional to 21,513.35, 29,688.03 and 11,953.28

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Solution

The fourth proportional to 21,513.35, 29,688.03 and 11,953.28 is: 16,495.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,513.35 : 29,688.03 = 11,953.28 : x
  2. Step 2: Convert to fraction form
    21,513.35/29,688.03 = 11,953.28/x
  3. Step 3: Cross multiply
    21,513.35x = 29,688.03 × 11,953.28
  4. Step 4: Simplify right side
    21,513.35x = 354,869,186.80
  5. Step 5: Solve for x
    x = 354,869,186.80/21,513.35
  6. Step 6: Final answer
    x = 16,495.30

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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.