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Finding the Fourth Proportional to 23,378.40, 34,981.20 and 21,304.80

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Solution

The fourth proportional to 23,378.40, 34,981.20 and 21,304.80 is: 31,878.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    23,378.40 : 34,981.20 = 21,304.80 : x
  2. Step 2: Convert to fraction form
    23,378.40/34,981.20 = 21,304.80/x
  3. Step 3: Cross multiply
    23,378.40x = 34,981.20 × 21,304.80
  4. Step 4: Simplify right side
    23,378.40x = 745,267,469.76
  5. Step 5: Solve for x
    x = 745,267,469.76/23,378.40
  6. Step 6: Final answer
    x = 31,878.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.