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Finding the Fourth Proportional to 14,289.66, 19,719.81 and 8,325.45

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Solution

The fourth proportional to 14,289.66, 19,719.81 and 8,325.45 is: 11,489.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,289.66 : 19,719.81 = 8,325.45 : x
  2. Step 2: Convert to fraction form
    14,289.66/19,719.81 = 8,325.45/x
  3. Step 3: Cross multiply
    14,289.66x = 19,719.81 × 8,325.45
  4. Step 4: Simplify right side
    14,289.66x = 164,176,292.16
  5. Step 5: Solve for x
    x = 164,176,292.16/14,289.66
  6. Step 6: Final answer
    x = 11,489.17

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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.