Home / 39,836.80-54,973.92-21,931.12

Finding the Fourth Proportional to 39,836.80, 54,973.92 and 21,931.12

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Solution

The fourth proportional to 39,836.80, 54,973.92 and 21,931.12 is: 30,264.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,836.80 : 54,973.92 = 21,931.12 : x
  2. Step 2: Convert to fraction form
    39,836.80/54,973.92 = 21,931.12/x
  3. Step 3: Cross multiply
    39,836.80x = 54,973.92 × 21,931.12
  4. Step 4: Simplify right side
    39,836.80x = 1,205,639,636.39
  5. Step 5: Solve for x
    x = 1,205,639,636.39/39,836.80
  6. Step 6: Final answer
    x = 30,264.47

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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.