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Finding the Fourth Proportional to 19,919.01, 29,878.52 and 6,780.81

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Solution

The fourth proportional to 19,919.01, 29,878.52 and 6,780.81 is: 10,171.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,919.01 : 29,878.52 = 6,780.81 : x
  2. Step 2: Convert to fraction form
    19,919.01/29,878.52 = 6,780.81/x
  3. Step 3: Cross multiply
    19,919.01x = 29,878.52 × 6,780.81
  4. Step 4: Simplify right side
    19,919.01x = 202,600,533.30
  5. Step 5: Solve for x
    x = 202,600,533.30/19,919.01
  6. Step 6: Final answer
    x = 10,171.22

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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.