Home / 19,981.63-29,972.46-5,189.31

Finding the Fourth Proportional to 19,981.63, 29,972.46 and 5,189.31

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Solution

The fourth proportional to 19,981.63, 29,972.46 and 5,189.31 is: 7,783.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,981.63 : 29,972.46 = 5,189.31 : x
  2. Step 2: Convert to fraction form
    19,981.63/29,972.46 = 5,189.31/x
  3. Step 3: Cross multiply
    19,981.63x = 29,972.46 × 5,189.31
  4. Step 4: Simplify right side
    19,981.63x = 155,536,386.40
  5. Step 5: Solve for x
    x = 155,536,386.40/19,981.63
  6. Step 6: Final answer
    x = 7,783.97

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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.