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Finding the Fourth Proportional to 21,988.48, 30,343.68 and 12,052.48

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Solution

The fourth proportional to 21,988.48, 30,343.68 and 12,052.48 is: 16,632.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,988.48 : 30,343.68 = 12,052.48 : x
  2. Step 2: Convert to fraction form
    21,988.48/30,343.68 = 12,052.48/x
  3. Step 3: Cross multiply
    21,988.48x = 30,343.68 × 12,052.48
  4. Step 4: Simplify right side
    21,988.48x = 365,716,596.33
  5. Step 5: Solve for x
    x = 365,716,596.33/21,988.48
  6. Step 6: Final answer
    x = 16,632.19

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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.