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Finding the Fourth Proportional to 20,603.70, 28,411.74 and 17,629.38

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Solution

The fourth proportional to 20,603.70, 28,411.74 and 17,629.38 is: 24,310.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,603.70 : 28,411.74 = 17,629.38 : x
  2. Step 2: Convert to fraction form
    20,603.70/28,411.74 = 17,629.38/x
  3. Step 3: Cross multiply
    20,603.70x = 28,411.74 × 17,629.38
  4. Step 4: Simplify right side
    20,603.70x = 500,881,360.92
  5. Step 5: Solve for x
    x = 500,881,360.92/20,603.70
  6. Step 6: Final answer
    x = 24,310.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.