Home / 21,771.10-30,001.11-15,465.82

Finding the Fourth Proportional to 21,771.10, 30,001.11 and 15,465.82

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Solution

The fourth proportional to 21,771.10, 30,001.11 and 15,465.82 is: 21,312.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,771.10 : 30,001.11 = 15,465.82 : x
  2. Step 2: Convert to fraction form
    21,771.10/30,001.11 = 15,465.82/x
  3. Step 3: Cross multiply
    21,771.10x = 30,001.11 × 15,465.82
  4. Step 4: Simplify right side
    21,771.10x = 463,991,767.06
  5. Step 5: Solve for x
    x = 463,991,767.06/21,771.10
  6. Step 6: Final answer
    x = 21,312.28

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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.