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Finding the Fourth Proportional to 15,085.68, 20,818.31 and 8,371.30

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Solution

The fourth proportional to 15,085.68, 20,818.31 and 8,371.30 is: 11,552.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,085.68 : 20,818.31 = 8,371.30 : x
  2. Step 2: Convert to fraction form
    15,085.68/20,818.31 = 8,371.30/x
  3. Step 3: Cross multiply
    15,085.68x = 20,818.31 × 8,371.30
  4. Step 4: Simplify right side
    15,085.68x = 174,276,214.41
  5. Step 5: Solve for x
    x = 174,276,214.41/15,085.68
  6. Step 6: Final answer
    x = 11,552.43

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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.