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Finding the Fourth Proportional to 11,365.55, 15,694.36 and 7,123.90

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Solution

The fourth proportional to 11,365.55, 15,694.36 and 7,123.90 is: 9,837.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,365.55 : 15,694.36 = 7,123.90 : x
  2. Step 2: Convert to fraction form
    11,365.55/15,694.36 = 7,123.90/x
  3. Step 3: Cross multiply
    11,365.55x = 15,694.36 × 7,123.90
  4. Step 4: Simplify right side
    11,365.55x = 111,805,051.20
  5. Step 5: Solve for x
    x = 111,805,051.20/11,365.55
  6. Step 6: Final answer
    x = 9,837.19

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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.