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Finding the Fourth Proportional to 15,216.84, 20,996.73 and 8,502.12

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Solution

The fourth proportional to 15,216.84, 20,996.73 and 8,502.12 is: 11,731.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,216.84 : 20,996.73 = 8,502.12 : x
  2. Step 2: Convert to fraction form
    15,216.84/20,996.73 = 8,502.12/x
  3. Step 3: Cross multiply
    15,216.84x = 20,996.73 × 8,502.12
  4. Step 4: Simplify right side
    15,216.84x = 178,516,718.07
  5. Step 5: Solve for x
    x = 178,516,718.07/15,216.84
  6. Step 6: Final answer
    x = 11,731.52

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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.