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Finding the Fourth Proportional to 55,360.70, 82,991.74 and 20,292.15

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Solution

The fourth proportional to 55,360.70, 82,991.74 and 20,292.15 is: 30,420.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,360.70 : 82,991.74 = 20,292.15 : x
  2. Step 2: Convert to fraction form
    55,360.70/82,991.74 = 20,292.15/x
  3. Step 3: Cross multiply
    55,360.70x = 82,991.74 × 20,292.15
  4. Step 4: Simplify right side
    55,360.70x = 1,684,080,836.84
  5. Step 5: Solve for x
    x = 1,684,080,836.84/55,360.70
  6. Step 6: Final answer
    x = 30,420.15

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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.