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Finding the Fourth Proportional to 9,329.78, 12,875.04 and 5,138

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Solution

The fourth proportional to 9,329.78, 12,875.04 and 5,138 is: 7,090.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,329.78 : 12,875.04 = 5,138 : x
  2. Step 2: Convert to fraction form
    9,329.78/12,875.04 = 5,138/x
  3. Step 3: Cross multiply
    9,329.78x = 12,875.04 × 5,138
  4. Step 4: Simplify right side
    9,329.78x = 66,151,955.52
  5. Step 5: Solve for x
    x = 66,151,955.52/9,329.78
  6. Step 6: Final answer
    x = 7,090.41

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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.