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Finding the Fourth Proportional to 21,988.50, 30,344.13 and 12,052.50

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Solution

The fourth proportional to 21,988.50, 30,344.13 and 12,052.50 is: 16,632.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,988.50 : 30,344.13 = 12,052.50 : x
  2. Step 2: Convert to fraction form
    21,988.50/30,344.13 = 12,052.50/x
  3. Step 3: Cross multiply
    21,988.50x = 30,344.13 × 12,052.50
  4. Step 4: Simplify right side
    21,988.50x = 365,722,626.83
  5. Step 5: Solve for x
    x = 365,722,626.83/21,988.50
  6. Step 6: Final answer
    x = 16,632.45

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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.