Home / 39,878.28-55,032.51-21,972.84

Finding the Fourth Proportional to 39,878.28, 55,032.51 and 21,972.84

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Solution

The fourth proportional to 39,878.28, 55,032.51 and 21,972.84 is: 30,322.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,878.28 : 55,032.51 = 21,972.84 : x
  2. Step 2: Convert to fraction form
    39,878.28/55,032.51 = 21,972.84/x
  3. Step 3: Cross multiply
    39,878.28x = 55,032.51 × 21,972.84
  4. Step 4: Simplify right side
    39,878.28x = 1,209,220,537.03
  5. Step 5: Solve for x
    x = 1,209,220,537.03/39,878.28
  6. Step 6: Final answer
    x = 30,322.79

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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.