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Finding the Fourth Proportional to 22,409.79, 30,913.89 and 18,165.65

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Solution

The fourth proportional to 22,409.79, 30,913.89 and 18,165.65 is: 25,059.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,409.79 : 30,913.89 = 18,165.65 : x
  2. Step 2: Convert to fraction form
    22,409.79/30,913.89 = 18,165.65/x
  3. Step 3: Cross multiply
    22,409.79x = 30,913.89 × 18,165.65
  4. Step 4: Simplify right side
    22,409.79x = 561,570,751.31
  5. Step 5: Solve for x
    x = 561,570,751.31/22,409.79
  6. Step 6: Final answer
    x = 25,059.17

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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.