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Finding the Fourth Proportional to 19,619.27, 29,419.69 and 7,130.49

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Solution

The fourth proportional to 19,619.27, 29,419.69 and 7,130.49 is: 10,692.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,619.27 : 29,419.69 = 7,130.49 : x
  2. Step 2: Convert to fraction form
    19,619.27/29,419.69 = 7,130.49/x
  3. Step 3: Cross multiply
    19,619.27x = 29,419.69 × 7,130.49
  4. Step 4: Simplify right side
    19,619.27x = 209,776,805.35
  5. Step 5: Solve for x
    x = 209,776,805.35/19,619.27
  6. Step 6: Final answer
    x = 10,692.39

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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.