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Finding the Fourth Proportional to 15,039.08, 20,753.78 and 8,992.10

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Solution

The fourth proportional to 15,039.08, 20,753.78 and 8,992.10 is: 12,409.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,039.08 : 20,753.78 = 8,992.10 : x
  2. Step 2: Convert to fraction form
    15,039.08/20,753.78 = 8,992.10/x
  3. Step 3: Cross multiply
    15,039.08x = 20,753.78 × 8,992.10
  4. Step 4: Simplify right side
    15,039.08x = 186,620,065.14
  5. Step 5: Solve for x
    x = 186,620,065.14/15,039.08
  6. Step 6: Final answer
    x = 12,409.01

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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.