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Finding the Fourth Proportional to 13,615.94, 20,384.51 and 7,976.58

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Solution

The fourth proportional to 13,615.94, 20,384.51 and 7,976.58 is: 11,941.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,615.94 : 20,384.51 = 7,976.58 : x
  2. Step 2: Convert to fraction form
    13,615.94/20,384.51 = 7,976.58/x
  3. Step 3: Cross multiply
    13,615.94x = 20,384.51 × 7,976.58
  4. Step 4: Simplify right side
    13,615.94x = 162,598,674.78
  5. Step 5: Solve for x
    x = 162,598,674.78/13,615.94
  6. Step 6: Final answer
    x = 11,941.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.