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Finding the Fourth Proportional to 23,009.40, 31,770.90 and 18,554.40

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Solution

The fourth proportional to 23,009.40, 31,770.90 and 18,554.40 is: 25,619.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    23,009.40 : 31,770.90 = 18,554.40 : x
  2. Step 2: Convert to fraction form
    23,009.40/31,770.90 = 18,554.40/x
  3. Step 3: Cross multiply
    23,009.40x = 31,770.90 × 18,554.40
  4. Step 4: Simplify right side
    23,009.40x = 589,489,986.96
  5. Step 5: Solve for x
    x = 589,489,986.96/23,009.40
  6. Step 6: Final answer
    x = 25,619.53

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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.