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Finding the Fourth Proportional to 15,011.63, 20,716.04 and 8,387.63

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Solution

The fourth proportional to 15,011.63, 20,716.04 and 8,387.63 is: 11,574.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,011.63 : 20,716.04 = 8,387.63 : x
  2. Step 2: Convert to fraction form
    15,011.63/20,716.04 = 8,387.63/x
  3. Step 3: Cross multiply
    15,011.63x = 20,716.04 × 8,387.63
  4. Step 4: Simplify right side
    15,011.63x = 173,758,395.97
  5. Step 5: Solve for x
    x = 173,758,395.97/15,011.63
  6. Step 6: Final answer
    x = 11,574.92

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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.