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Finding the Fourth Proportional to 15,191.46, 20,964.20 and 8,903.84

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Solution

The fourth proportional to 15,191.46, 20,964.20 and 8,903.84 is: 12,287.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,191.46 : 20,964.20 = 8,903.84 : x
  2. Step 2: Convert to fraction form
    15,191.46/20,964.20 = 8,903.84/x
  3. Step 3: Cross multiply
    15,191.46x = 20,964.20 × 8,903.84
  4. Step 4: Simplify right side
    15,191.46x = 186,661,733.19
  5. Step 5: Solve for x
    x = 186,661,733.19/15,191.46
  6. Step 6: Final answer
    x = 12,287.28

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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.