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Finding the Fourth Proportional to 15,406.67, 21,261.08 and 8,333.11

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Solution

The fourth proportional to 15,406.67, 21,261.08 and 8,333.11 is: 11,499.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,406.67 : 21,261.08 = 8,333.11 : x
  2. Step 2: Convert to fraction form
    15,406.67/21,261.08 = 8,333.11/x
  3. Step 3: Cross multiply
    15,406.67x = 21,261.08 × 8,333.11
  4. Step 4: Simplify right side
    15,406.67x = 177,170,965.77
  5. Step 5: Solve for x
    x = 177,170,965.77/15,406.67
  6. Step 6: Final answer
    x = 11,499.63

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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.