Home / 13,456.74-18,569.07-9,921.90

Finding the Fourth Proportional to 13,456.74, 18,569.07 and 9,921.90

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Solution

The fourth proportional to 13,456.74, 18,569.07 and 9,921.90 is: 13,691.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,456.74 : 18,569.07 = 9,921.90 : x
  2. Step 2: Convert to fraction form
    13,456.74/18,569.07 = 9,921.90/x
  3. Step 3: Cross multiply
    13,456.74x = 18,569.07 × 9,921.90
  4. Step 4: Simplify right side
    13,456.74x = 184,240,455.63
  5. Step 5: Solve for x
    x = 184,240,455.63/13,456.74
  6. Step 6: Final answer
    x = 13,691.31

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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.