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Finding the Fourth Proportional to 55,275.40, 82,923.90 and 21,989.80

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Solution

The fourth proportional to 55,275.40, 82,923.90 and 21,989.80 is: 32,989.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,275.40 : 82,923.90 = 21,989.80 : x
  2. Step 2: Convert to fraction form
    55,275.40/82,923.90 = 21,989.80/x
  3. Step 3: Cross multiply
    55,275.40x = 82,923.90 × 21,989.80
  4. Step 4: Simplify right side
    55,275.40x = 1,823,479,976.22
  5. Step 5: Solve for x
    x = 1,823,479,976.22/55,275.40
  6. Step 6: Final answer
    x = 32,989.00

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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.