Home / 19,995.81-29,997.36-10,005.78

Finding the Fourth Proportional to 19,995.81, 29,997.36 and 10,005.78

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Solution

The fourth proportional to 19,995.81, 29,997.36 and 10,005.78 is: 15,010.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,995.81 : 29,997.36 = 10,005.78 : x
  2. Step 2: Convert to fraction form
    19,995.81/29,997.36 = 10,005.78/x
  3. Step 3: Cross multiply
    19,995.81x = 29,997.36 × 10,005.78
  4. Step 4: Simplify right side
    19,995.81x = 300,146,984.74
  5. Step 5: Solve for x
    x = 300,146,984.74/19,995.81
  6. Step 6: Final answer
    x = 15,010.49

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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.