Home / 39,868.81-55,020.36-21,965.18

Finding the Fourth Proportional to 39,868.81, 55,020.36 and 21,965.18

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Solution

The fourth proportional to 39,868.81, 55,020.36 and 21,965.18 is: 30,312.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,868.81 : 55,020.36 = 21,965.18 : x
  2. Step 2: Convert to fraction form
    39,868.81/55,020.36 = 21,965.18/x
  3. Step 3: Cross multiply
    39,868.81x = 55,020.36 × 21,965.18
  4. Step 4: Simplify right side
    39,868.81x = 1,208,531,918.33
  5. Step 5: Solve for x
    x = 1,208,531,918.33/39,868.81
  6. Step 6: Final answer
    x = 30,312.72

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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.