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Finding the Fourth Proportional to 15,182.71, 20,954.85 and 9,811.80

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Solution

The fourth proportional to 15,182.71, 20,954.85 and 9,811.80 is: 13,542.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,182.71 : 20,954.85 = 9,811.80 : x
  2. Step 2: Convert to fraction form
    15,182.71/20,954.85 = 9,811.80/x
  3. Step 3: Cross multiply
    15,182.71x = 20,954.85 × 9,811.80
  4. Step 4: Simplify right side
    15,182.71x = 205,604,815.63
  5. Step 5: Solve for x
    x = 205,604,815.63/15,182.71
  6. Step 6: Final answer
    x = 13,542.04

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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.