Home / 21,351.81-31,984.86-19,607.90

Finding the Fourth Proportional to 21,351.81, 31,984.86 and 19,607.90

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Solution

The fourth proportional to 21,351.81, 31,984.86 and 19,607.90 is: 29,372.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,351.81 : 31,984.86 = 19,607.90 : x
  2. Step 2: Convert to fraction form
    21,351.81/31,984.86 = 19,607.90/x
  3. Step 3: Cross multiply
    21,351.81x = 31,984.86 × 19,607.90
  4. Step 4: Simplify right side
    21,351.81x = 627,155,936.39
  5. Step 5: Solve for x
    x = 627,155,936.39/21,351.81
  6. Step 6: Final answer
    x = 29,372.50

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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.