Home / 19,991.52-29,987.12-8,142.50

Finding the Fourth Proportional to 19,991.52, 29,987.12 and 8,142.50

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Solution

The fourth proportional to 19,991.52, 29,987.12 and 8,142.50 is: 12,213.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,991.52 : 29,987.12 = 8,142.50 : x
  2. Step 2: Convert to fraction form
    19,991.52/29,987.12 = 8,142.50/x
  3. Step 3: Cross multiply
    19,991.52x = 29,987.12 × 8,142.50
  4. Step 4: Simplify right side
    19,991.52x = 244,170,219.92
  5. Step 5: Solve for x
    x = 244,170,219.92/19,991.52
  6. Step 6: Final answer
    x = 12,213.69

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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.