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Finding the Fourth Proportional to 15,091.76, 20,812.13 and 9,041.05

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Solution

The fourth proportional to 15,091.76, 20,812.13 and 9,041.05 is: 12,467.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,091.76 : 20,812.13 = 9,041.05 : x
  2. Step 2: Convert to fraction form
    15,091.76/20,812.13 = 9,041.05/x
  3. Step 3: Cross multiply
    15,091.76x = 20,812.13 × 9,041.05
  4. Step 4: Simplify right side
    15,091.76x = 188,163,507.94
  5. Step 5: Solve for x
    x = 188,163,507.94/15,091.76
  6. Step 6: Final answer
    x = 12,467.96

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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.