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Finding the Fourth Proportional to 15,216.66, 20,998.95 and 8,410.64

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Solution

The fourth proportional to 15,216.66, 20,998.95 and 8,410.64 is: 11,606.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,216.66 : 20,998.95 = 8,410.64 : x
  2. Step 2: Convert to fraction form
    15,216.66/20,998.95 = 8,410.64/x
  3. Step 3: Cross multiply
    15,216.66x = 20,998.95 × 8,410.64
  4. Step 4: Simplify right side
    15,216.66x = 176,614,472.29
  5. Step 5: Solve for x
    x = 176,614,472.29/15,216.66
  6. Step 6: Final answer
    x = 11,606.65

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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.