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Finding the Fourth Proportional to 11,213, 15,475.42 and 7,245.66

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Solution

The fourth proportional to 11,213, 15,475.42 and 7,245.66 is: 9,999.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,213 : 15,475.42 = 7,245.66 : x
  2. Step 2: Convert to fraction form
    11,213/15,475.42 = 7,245.66/x
  3. Step 3: Cross multiply
    11,213x = 15,475.42 × 7,245.66
  4. Step 4: Simplify right side
    11,213x = 112,129,631.68
  5. Step 5: Solve for x
    x = 112,129,631.68/11,213
  6. Step 6: Final answer
    x = 9,999.97

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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.