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Finding the Fourth Proportional to 15,158.94, 20,913.54 and 9,491.34

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Solution

The fourth proportional to 15,158.94, 20,913.54 and 9,491.34 is: 13,094.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,158.94 : 20,913.54 = 9,491.34 : x
  2. Step 2: Convert to fraction form
    15,158.94/20,913.54 = 9,491.34/x
  3. Step 3: Cross multiply
    15,158.94x = 20,913.54 × 9,491.34
  4. Step 4: Simplify right side
    15,158.94x = 198,497,518.74
  5. Step 5: Solve for x
    x = 198,497,518.74/15,158.94
  6. Step 6: Final answer
    x = 13,094.42

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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.