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Finding the Fourth Proportional to 19,603.31, 29,404.97 and 7,121.01

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Solution

The fourth proportional to 19,603.31, 29,404.97 and 7,121.01 is: 10,681.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,603.31 : 29,404.97 = 7,121.01 : x
  2. Step 2: Convert to fraction form
    19,603.31/29,404.97 = 7,121.01/x
  3. Step 3: Cross multiply
    19,603.31x = 29,404.97 × 7,121.01
  4. Step 4: Simplify right side
    19,603.31x = 209,393,049.81
  5. Step 5: Solve for x
    x = 209,393,049.81/19,603.31
  6. Step 6: Final answer
    x = 10,681.52

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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.