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Finding the Fourth Proportional to 55,239.40, 82,869.90 and 21,953.80

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Solution

The fourth proportional to 55,239.40, 82,869.90 and 21,953.80 is: 32,934.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,239.40 : 82,869.90 = 21,953.80 : x
  2. Step 2: Convert to fraction form
    55,239.40/82,869.90 = 21,953.80/x
  3. Step 3: Cross multiply
    55,239.40x = 82,869.90 × 21,953.80
  4. Step 4: Simplify right side
    55,239.40x = 1,819,309,210.62
  5. Step 5: Solve for x
    x = 1,819,309,210.62/55,239.40
  6. Step 6: Final answer
    x = 32,934.99

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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.