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Finding the Fourth Proportional to 19,478.80, 29,218.20 and 7,004.80

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Solution

The fourth proportional to 19,478.80, 29,218.20 and 7,004.80 is: 10,507.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,478.80 : 29,218.20 = 7,004.80 : x
  2. Step 2: Convert to fraction form
    19,478.80/29,218.20 = 7,004.80/x
  3. Step 3: Cross multiply
    19,478.80x = 29,218.20 × 7,004.80
  4. Step 4: Simplify right side
    19,478.80x = 204,667,647.36
  5. Step 5: Solve for x
    x = 204,667,647.36/19,478.80
  6. Step 6: Final answer
    x = 10,507.20

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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.