Home / 21,455.47-32,204.73-19,991.55

Finding the Fourth Proportional to 21,455.47, 32,204.73 and 19,991.55

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Solution

The fourth proportional to 21,455.47, 32,204.73 and 19,991.55 is: 30,007.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,455.47 : 32,204.73 = 19,991.55 : x
  2. Step 2: Convert to fraction form
    21,455.47/32,204.73 = 19,991.55/x
  3. Step 3: Cross multiply
    21,455.47x = 32,204.73 × 19,991.55
  4. Step 4: Simplify right side
    21,455.47x = 643,822,470.03
  5. Step 5: Solve for x
    x = 643,822,470.03/21,455.47
  6. Step 6: Final answer
    x = 30,007.38

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1.5x scale

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.