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Finding the Fourth Proportional to 15,085.35, 20,816.35 and 8,711.46

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Solution

The fourth proportional to 15,085.35, 20,816.35 and 8,711.46 is: 12,020.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,085.35 : 20,816.35 = 8,711.46 : x
  2. Step 2: Convert to fraction form
    15,085.35/20,816.35 = 8,711.46/x
  3. Step 3: Cross multiply
    15,085.35x = 20,816.35 × 8,711.46
  4. Step 4: Simplify right side
    15,085.35x = 181,340,800.37
  5. Step 5: Solve for x
    x = 181,340,800.37/15,085.35
  6. Step 6: Final answer
    x = 12,020.99

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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.