Home / 19,838.05-29,756.77-7,991.55

Finding the Fourth Proportional to 19,838.05, 29,756.77 and 7,991.55

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Solution

The fourth proportional to 19,838.05, 29,756.77 and 7,991.55 is: 11,987.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,838.05 : 29,756.77 = 7,991.55 : x
  2. Step 2: Convert to fraction form
    19,838.05/29,756.77 = 7,991.55/x
  3. Step 3: Cross multiply
    19,838.05x = 29,756.77 × 7,991.55
  4. Step 4: Simplify right side
    19,838.05x = 237,802,695.31
  5. Step 5: Solve for x
    x = 237,802,695.31/19,838.05
  6. Step 6: Final answer
    x = 11,987.20

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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.