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Finding the Fourth Proportional to 20,503.59, 28,294.95 and 11,551.09

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Solution

The fourth proportional to 20,503.59, 28,294.95 and 11,551.09 is: 15,940.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,503.59 : 28,294.95 = 11,551.09 : x
  2. Step 2: Convert to fraction form
    20,503.59/28,294.95 = 11,551.09/x
  3. Step 3: Cross multiply
    20,503.59x = 28,294.95 × 11,551.09
  4. Step 4: Simplify right side
    20,503.59x = 326,837,372.52
  5. Step 5: Solve for x
    x = 326,837,372.52/20,503.59
  6. Step 6: Final answer
    x = 15,940.50

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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.