Home / 39,722.70-54,817.77-21,818.12

Finding the Fourth Proportional to 39,722.70, 54,817.77 and 21,818.12

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Solution

The fourth proportional to 39,722.70, 54,817.77 and 21,818.12 is: 30,109.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,722.70 : 54,817.77 = 21,818.12 : x
  2. Step 2: Convert to fraction form
    39,722.70/54,817.77 = 21,818.12/x
  3. Step 3: Cross multiply
    39,722.70x = 54,817.77 × 21,818.12
  4. Step 4: Simplify right side
    39,722.70x = 1,196,020,683.99
  5. Step 5: Solve for x
    x = 1,196,020,683.99/39,722.70
  6. Step 6: Final answer
    x = 30,109.25

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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.