Home / 39,891.89-55,051.99-21,988.06

Finding the Fourth Proportional to 39,891.89, 55,051.99 and 21,988.06

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Solution

The fourth proportional to 39,891.89, 55,051.99 and 21,988.06 is: 30,344.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,891.89 : 55,051.99 = 21,988.06 : x
  2. Step 2: Convert to fraction form
    39,891.89/55,051.99 = 21,988.06/x
  3. Step 3: Cross multiply
    39,891.89x = 55,051.99 × 21,988.06
  4. Step 4: Simplify right side
    39,891.89x = 1,210,486,266.64
  5. Step 5: Solve for x
    x = 1,210,486,266.64/39,891.89
  6. Step 6: Final answer
    x = 30,344.17

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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.