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Finding the Fourth Proportional to 20,603.76, 30,905.64 and 5,021.34

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Solution

The fourth proportional to 20,603.76, 30,905.64 and 5,021.34 is: 7,532.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,603.76 : 30,905.64 = 5,021.34 : x
  2. Step 2: Convert to fraction form
    20,603.76/30,905.64 = 5,021.34/x
  3. Step 3: Cross multiply
    20,603.76x = 30,905.64 × 5,021.34
  4. Step 4: Simplify right side
    20,603.76x = 155,187,726.36
  5. Step 5: Solve for x
    x = 155,187,726.36/20,603.76
  6. Step 6: Final answer
    x = 7,532.01

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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.