Home / 18,967.15-28,429.62-7,109.56

Finding the Fourth Proportional to 18,967.15, 28,429.62 and 7,109.56

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Solution

The fourth proportional to 18,967.15, 28,429.62 and 7,109.56 is: 10,656.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,967.15 : 28,429.62 = 7,109.56 : x
  2. Step 2: Convert to fraction form
    18,967.15/28,429.62 = 7,109.56/x
  3. Step 3: Cross multiply
    18,967.15x = 28,429.62 × 7,109.56
  4. Step 4: Simplify right side
    18,967.15x = 202,122,089.17
  5. Step 5: Solve for x
    x = 202,122,089.17/18,967.15
  6. Step 6: Final answer
    x = 10,656.43

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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.