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Finding the Fourth Proportional to 22,349.28, 30,838.32 and 12,917.28

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Solution

The fourth proportional to 22,349.28, 30,838.32 and 12,917.28 is: 17,823.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,349.28 : 30,838.32 = 12,917.28 : x
  2. Step 2: Convert to fraction form
    22,349.28/30,838.32 = 12,917.28/x
  3. Step 3: Cross multiply
    22,349.28x = 30,838.32 × 12,917.28
  4. Step 4: Simplify right side
    22,349.28x = 398,347,214.17
  5. Step 5: Solve for x
    x = 398,347,214.17/22,349.28
  6. Step 6: Final answer
    x = 17,823.72

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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.