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Finding the Fourth Proportional to 15,085.94, 20,819.57 and 8,713.71

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Solution

The fourth proportional to 15,085.94, 20,819.57 and 8,713.71 is: 12,025.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,085.94 : 20,819.57 = 8,713.71 : x
  2. Step 2: Convert to fraction form
    15,085.94/20,819.57 = 8,713.71/x
  3. Step 3: Cross multiply
    15,085.94x = 20,819.57 × 8,713.71
  4. Step 4: Simplify right side
    15,085.94x = 181,415,651.74
  5. Step 5: Solve for x
    x = 181,415,651.74/15,085.94
  6. Step 6: Final answer
    x = 12,025.48

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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.