Home / 39,683.39-54,764.63-21,779.03

Finding the Fourth Proportional to 39,683.39, 54,764.63 and 21,779.03

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Solution

The fourth proportional to 39,683.39, 54,764.63 and 21,779.03 is: 30,055.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,683.39 : 54,764.63 = 21,779.03 : x
  2. Step 2: Convert to fraction form
    39,683.39/54,764.63 = 21,779.03/x
  3. Step 3: Cross multiply
    39,683.39x = 54,764.63 × 21,779.03
  4. Step 4: Simplify right side
    39,683.39x = 1,192,720,136.99
  5. Step 5: Solve for x
    x = 1,192,720,136.99/39,683.39
  6. Step 6: Final answer
    x = 30,055.91

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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.