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Finding the Fourth Proportional to 20,798.97, 28,701.50 and 11,365.71

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Solution

The fourth proportional to 20,798.97, 28,701.50 and 11,365.71 is: 15,684.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,798.97 : 28,701.50 = 11,365.71 : x
  2. Step 2: Convert to fraction form
    20,798.97/28,701.50 = 11,365.71/x
  3. Step 3: Cross multiply
    20,798.97x = 28,701.50 × 11,365.71
  4. Step 4: Simplify right side
    20,798.97x = 326,212,925.57
  5. Step 5: Solve for x
    x = 326,212,925.57/20,798.97
  6. Step 6: Final answer
    x = 15,684.09

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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.