Home / 19,769.70-29,647.09-6,439.21

Finding the Fourth Proportional to 19,769.70, 29,647.09 and 6,439.21

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Solution

The fourth proportional to 19,769.70, 29,647.09 and 6,439.21 is: 9,656.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,769.70 : 29,647.09 = 6,439.21 : x
  2. Step 2: Convert to fraction form
    19,769.70/29,647.09 = 6,439.21/x
  3. Step 3: Cross multiply
    19,769.70x = 29,647.09 × 6,439.21
  4. Step 4: Simplify right side
    19,769.70x = 190,903,838.40
  5. Step 5: Solve for x
    x = 190,903,838.40/19,769.70
  6. Step 6: Final answer
    x = 9,656.39

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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.