Home / 19,987.12-29,997.96-7,683.76

Finding the Fourth Proportional to 19,987.12, 29,997.96 and 7,683.76

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Solution

The fourth proportional to 19,987.12, 29,997.96 and 7,683.76 is: 11,532.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,987.12 : 29,997.96 = 7,683.76 : x
  2. Step 2: Convert to fraction form
    19,987.12/29,997.96 = 7,683.76/x
  3. Step 3: Cross multiply
    19,987.12x = 29,997.96 × 7,683.76
  4. Step 4: Simplify right side
    19,987.12x = 230,497,125.13
  5. Step 5: Solve for x
    x = 230,497,125.13/19,987.12
  6. Step 6: Final answer
    x = 11,532.28

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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.