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Finding the Fourth Proportional to 39,228.99, 54,136.04 and 21,323.99

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Solution

The fourth proportional to 39,228.99, 54,136.04 and 21,323.99 is: 29,427.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,228.99 : 54,136.04 = 21,323.99 : x
  2. Step 2: Convert to fraction form
    39,228.99/54,136.04 = 21,323.99/x
  3. Step 3: Cross multiply
    39,228.99x = 54,136.04 × 21,323.99
  4. Step 4: Simplify right side
    39,228.99x = 1,154,396,268.98
  5. Step 5: Solve for x
    x = 1,154,396,268.98/39,228.99
  6. Step 6: Final answer
    x = 29,427.13

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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.