Home / 28,605.51-39,448.35-21,891.42

Finding the Fourth Proportional to 28,605.51, 39,448.35 and 21,891.42

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Solution

The fourth proportional to 28,605.51, 39,448.35 and 21,891.42 is: 30,189.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,605.51 : 39,448.35 = 21,891.42 : x
  2. Step 2: Convert to fraction form
    28,605.51/39,448.35 = 21,891.42/x
  3. Step 3: Cross multiply
    28,605.51x = 39,448.35 × 21,891.42
  4. Step 4: Simplify right side
    28,605.51x = 863,580,398.16
  5. Step 5: Solve for x
    x = 863,580,398.16/28,605.51
  6. Step 6: Final answer
    x = 30,189.30

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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.