Home / 13,921.89-20,881.89-6,528

Finding the Fourth Proportional to 13,921.89, 20,881.89 and 6,528

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Solution

The fourth proportional to 13,921.89, 20,881.89 and 6,528 is: 9,791.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,921.89 : 20,881.89 = 6,528 : x
  2. Step 2: Convert to fraction form
    13,921.89/20,881.89 = 6,528/x
  3. Step 3: Cross multiply
    13,921.89x = 20,881.89 × 6,528
  4. Step 4: Simplify right side
    13,921.89x = 136,316,977.92
  5. Step 5: Solve for x
    x = 136,316,977.92/13,921.89
  6. Step 6: Final answer
    x = 9,791.56

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.