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Finding the Fourth Proportional to 20,813.74, 28,702.79 and 17,626.79

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Solution

The fourth proportional to 20,813.74, 28,702.79 and 17,626.79 is: 24,307.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,813.74 : 28,702.79 = 17,626.79 : x
  2. Step 2: Convert to fraction form
    20,813.74/28,702.79 = 17,626.79/x
  3. Step 3: Cross multiply
    20,813.74x = 28,702.79 × 17,626.79
  4. Step 4: Simplify right side
    20,813.74x = 505,938,101.47
  5. Step 5: Solve for x
    x = 505,938,101.47/20,813.74
  6. Step 6: Final answer
    x = 24,307.89

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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.