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Finding the Fourth Proportional to 11,128.93, 15,368.33 and 7,156.94

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Solution

The fourth proportional to 11,128.93, 15,368.33 and 7,156.94 is: 9,883.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,128.93 : 15,368.33 = 7,156.94 : x
  2. Step 2: Convert to fraction form
    11,128.93/15,368.33 = 7,156.94/x
  3. Step 3: Cross multiply
    11,128.93x = 15,368.33 × 7,156.94
  4. Step 4: Simplify right side
    11,128.93x = 109,990,215.71
  5. Step 5: Solve for x
    x = 109,990,215.71/11,128.93
  6. Step 6: Final answer
    x = 9,883.27

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.